HOXB6: Difference between revisions

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<!-- The PBB_Controls template provides controls for Protein Box Bot, please see Template:PBB_Controls for details. -->
{{Infobox_gene}}
{{PBB_Controls
'''Homeobox protein Hox-B6''' is a [[protein]] that in humans is encoded by the ''HOXB6'' [[gene]].<ref name="pmid1973146">{{cite journal | vauthors = McAlpine PJ, Shows TB | title = Nomenclature for human homeobox genes | journal = Genomics | volume = 7 | issue = 3 | pages = 460 | date = Jul 1990 | pmid = 1973146 | pmc =  | doi = 10.1016/0888-7543(90)90186-X }}</ref><ref name="pmid1358459">{{cite journal | vauthors = Scott MP | title = Vertebrate homeobox gene nomenclature | journal = Cell | volume = 71 | issue = 4 | pages = 551–3 | date = Nov 1992 | pmid = 1358459 | pmc = | doi = 10.1016/0092-8674(92)90588-4 }}</ref><ref name="entrez">{{cite web | title = Entrez Gene: HOXB6 homeobox B6| url = https://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=3216| accessdate = }}</ref>
| update_page = yes
| require_manual_inspection = no
| update_protein_box = yes
| update_summary = yes
| update_citations = yes
}}


<!-- The GNF_Protein_box is automatically maintained by Protein Box Bot.  See Template:PBB_Controls to Stop updates. -->
== Function ==
{{GNF_Protein_box
| image = PBB_Protein_HOXB6_image.jpg
| image_source = [[Protein_Data_Bank|PDB]] rendering based on 1ahd.
| PDB = {{PDB2|1ahd}}, {{PDB2|1hom}}, {{PDB2|1san}}, {{PDB2|2hoa}}, {{PDB2|9ant}}
| Name = Homeobox B6
| HGNCid = 5117
| Symbol = HOXB6
| AltSymbols =; HOX2; HOX2B; HU-2; Hox-2.2
| OMIM = 142961
| ECnumber = 
| Homologene = 7366
| MGIid = 96187
| GeneAtlas_image1 = PBB_GE_HOXB6_205366_s_at_tn.png
| Function = {{GNF_GO|id=GO:0003700 |text = transcription factor activity}} {{GNF_GO|id=GO:0043565 |text = sequence-specific DNA binding}}
| Component = {{GNF_GO|id=GO:0005634 |text = nucleus}}
| Process = {{GNF_GO|id=GO:0006355 |text = regulation of transcription, DNA-dependent}} {{GNF_GO|id=GO:0007275 |text = multicellular organismal development}} {{GNF_GO|id=GO:0008595 |text = determination of anterior/posterior axis, embryo}}
| Orthologs = {{GNF_Ortholog_box
    | Hs_EntrezGene = 3216
    | Hs_Ensembl = ENSG00000108511
    | Hs_RefseqProtein = NP_061825
    | Hs_RefseqmRNA = NM_018952
    | Hs_GenLoc_db = 
    | Hs_GenLoc_chr = 17
    | Hs_GenLoc_start = 44028113
    | Hs_GenLoc_end = 44037333
    | Hs_Uniprot = P17509
    | Mm_EntrezGene = 15414
    | Mm_Ensembl = ENSMUSG00000000690
    | Mm_RefseqmRNA = NM_008269
    | Mm_RefseqProtein = NP_032295
    | Mm_GenLoc_db = 
    | Mm_GenLoc_chr = 11
    | Mm_GenLoc_start = 96115164
    | Mm_GenLoc_end = 96117656
    | Mm_Uniprot = P09023
  }}
}}
'''Homeobox B6''', also known as '''HOXB6''', is a human [[gene]].<ref name="entrez">{{cite web | title = Entrez Gene: HOXB6 homeobox B6| url = http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=3216| accessdate = }}</ref>


<!-- The PBB_Summary template is automatically maintained by Protein Box Bot.  See Template:PBB_Controls to Stop updates. -->
This gene is a member of the Antp [[homeobox]] family and encodes a protein with a homeobox [[DNA-binding domain]]. It is included in a cluster of homeobox B genes located on [[chromosome 17]]. The encoded protein functions as a sequence-specific transcription factor that is involved in development, including that of lung and skin, and has been localized to both the nucleus and cytoplasm. Altered expression of this gene or a change in the subcellular localization of its protein is associated with some cases of [[acute myeloid leukemia]] and [[colorectal cancer]].<ref name="entrez" />
{{PBB_Summary
| section_title =
| summary_text = This gene is a member of the Antp homeobox family and encodes a protein with a homeobox DNA-binding domain. It is included in a cluster of homeobox B genes located on chromosome 17. The encoded protein functions as a sequence-specific transcription factor that is involved in development, including that of lung and skin, and has been localized to both the nucleus and cytoplasm. Altered expression of this gene or a change in the subcellular localization of its protein is associated with some cases of acute myeloid leukemia and colorectal cancer.<ref name="entrez">{{cite web | title = Entrez Gene: HOXB6 homeobox B6| url = http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=3216| accessdate = }}</ref>
}}


==See also==
== During development ==
 
HOX B6 gene is only expressed in erythoid progenitor cells, which are the precursor to red blood cells used for transport of oxygen and carbon dioxide throughout the body. During development, the formation of the HOX gene factor happens in the first stages of fetal development, namely soon after the establishment of the [[mesoderm]], which is the “middle layer” of the future embryo. However, HOX B6 is only expressed once the undifferentiated stem cells of the embryo distinguish themselves into the erythpoietic phase. The research has shown that HOX B6 is not expressed in hematopoietic stem cells located in the red bone marrow, which are the precursor cells to all types of blood cells, or primordial germ cells (PGCs), the precursor to cells passed on in each generation.<ref>{{cite journal | vauthors = Zimmermann F, Rich IN | title = Mammalian homeobox B6 expression can be correlated with erythropoietin production sites and erythropoiesis during development, but not with hematopoietic or nonhematopoietic stem cell populations | journal = Blood | volume = 89 | issue = 8 | pages = 2723–35 | date = Apr 1997 | pmid = 9108390 }}</ref>  Since it is a transcriptional factor, HOX B6 regulates erythpoigenesis (red blood cell formation) using mRNA as the basis for certain protein productions.  The specific gene factor for erytopoigenesis has relatively been unobserved in the scientific community, and no known diseases have been associated with a defect HOX B6 gene. However, it has been shown in correlation with major skeletal deformations.<ref>{{cite journal | vauthors = Rancourt DE, Tsuzuki T, Capecchi MR | title = Genetic interaction between hoxb-5 and hoxb-6 is revealed by nonallelic noncomplementation | journal = Genes & Development | volume = 9 | issue = 1 | pages = 108–22  | date = Jan 1995 | pmid = 7828847 | doi=10.1101/gad.9.1.108}}</ref>
 
HOXB6 is a structural protein that has been shown to influence the growth and differentiation of the different blood lineages. This gene has also been shown to encourage the growth of granulocytes and monocytes, but at the cost of other blood cells. HOXB6 has the ability to cause the indefinite proliferation of murine marrow cells, as well as expand hematopoietic stem cells. When expressed abnormally, HOXB6 displays many characteristics of a potent oncoprotein. An oncoprotein can cause the transformation of a normal cell into a tumor cell. Overexpression of HOXB6, along with the addition of MEIS1 protein, has been implicated in the development of acute myeloid leukemia (AML). Acute myeloid leukemia is a cancer of the blood cells, specifically the leukocytes. The chromosomal irregularity most frequently seen in HOXB6 AML is a reappearing interstitial deletion of chromosome 2. Fundamental HOXB6 expression stops myeloid differentiation and debilitates erythropoiesis, megakaryopoiesis, and lymphopoiesis.<ref name="pmid15522959">{{cite journal | vauthors = Fischbach NA, Rozenfeld S, Shen W, Fong S, Chrobak D, Ginzinger D, Kogan SC, Radhakrishnan A, Le Beau MM, Largman C, Lawrence HJ | title = HOXB6 overexpression in murine bone marrow immortalizes a myelomonocytic precursor in vitro and causes hematopoietic stem cell expansion and acute myeloid leukemia in vivo | journal = Blood | volume = 105 | issue = 4 | pages = 1456–66 | year = 2005 | pmid = 15522959 | doi = 10.1182/blood-2004-04-1583 }}</ref>
 
== See also ==
* [[Homeobox]]
* [[Homeobox]]


==References==
== References ==
{{reflist|2}}
{{reflist}}
{{Clear}}


==Further reading==
== Further reading ==
{{refbegin | 2}}
{{refbegin|33em}}
{{PBB_Further_reading
* {{cite journal | vauthors = Kaur S, Singh G, Stock JL, Schreiner CM, Kier AB, Yager KL, Mucenski ML, Scott WJ, Potter SS | title = Dominant mutation of the murine Hox-2.2 gene results in developmental abnormalities | journal = The Journal of Experimental Zoology | volume = 264 | issue = 3 | pages = 323–36 | date = Dec 1992 | pmid = 1358998 | doi = 10.1002/jez.1402640311 }}
| citations =
* {{cite journal | vauthors = Shen WF, Detmer K, Simonitch-Eason TA, Lawrence HJ, Largman C | title = Alternative splicing of the HOX 2.2 homeobox gene in human hematopoietic cells and murine embryonic and adult tissues | journal = Nucleic Acids Research | volume = 19 | issue = 3 | pages = 539–45 | date = Feb 1991 | pmid = 1672751 | pmc = 333645 | doi = 10.1093/nar/19.3.539 }}
*{{cite journal | author=Scott MP |title=Vertebrate homeobox gene nomenclature. |journal=Cell |volume=71 |issue= 4 |pages= 551-3 |year= 1992 |pmid= 1358459 |doi= }}
* {{cite journal | vauthors = Peverali FA, D'Esposito M, Acampora D, Bunone G, Negri M, Faiella A, Stornaiuolo A, Pannese M, Migliaccio E, Simeone A | title = Expression of HOX homeogenes in human neuroblastoma cell culture lines | journal = Differentiation; Research in Biological Diversity | volume = 45 | issue = 1 | pages = 61–9 | date = Oct 1990 | pmid = 1981366 | doi = 10.1111/j.1432-0436.1990.tb00458.x }}
*{{cite journal | author=Kaur S, Singh G, Stock JL, ''et al.'' |title=Dominant mutation of the murine Hox-2.2 gene results in developmental abnormalities. |journal=J. Exp. Zool. |volume=264 |issue= 3 |pages= 323-36 |year= 1992 |pmid= 1358998 |doi= 10.1002/jez.1402640311 }}
* {{cite journal | vauthors = Giampaolo A, Acampora D, Zappavigna V, Pannese M, D'Esposito M, Carè A, Faiella A, Stornaiuolo A, Russo G, Simeone A | title = Differential expression of human HOX-2 genes along the anterior-posterior axis in embryonic central nervous system | journal = Differentiation; Research in Biological Diversity | volume = 40 | issue = 3 | pages = 191–7 | date = Jun 1989 | pmid = 2570724 | doi = 10.1111/j.1432-0436.1989.tb00598.x }}
*{{cite journal | author=Shen WF, Detmer K, Simonitch-Eason TA, ''et al.'' |title=Alternative splicing of the HOX 2.2 homeobox gene in human hematopoietic cells and murine embryonic and adult tissues. |journal=Nucleic Acids Res. |volume=19 |issue= 3 |pages= 539-45 |year= 1991 |pmid= 1672751 |doi= }}
* {{cite journal | vauthors = Shen WF, Largman C, Lowney P, Corral JC, Detmer K, Hauser CA, Simonitch TA, Hack FM, Lawrence HJ | title = Lineage-restricted expression of homeobox-containing genes in human hematopoietic cell lines | journal = Proceedings of the National Academy of Sciences of the United States of America | volume = 86 | issue = 21 | pages = 8536–40 | date = Nov 1989 | pmid = 2573064 | pmc = 298317 | doi = 10.1073/pnas.86.21.8536 }}
*{{cite journal | author=McAlpine PJ, Shows TB |title=Nomenclature for human homeobox genes. |journal=Genomics |volume=7 |issue= 3 |pages= 460 |year= 1990 |pmid= 1973146 |doi= }}
* {{cite journal | vauthors = Acampora D, D'Esposito M, Faiella A, Pannese M, Migliaccio E, Morelli F, Stornaiuolo A, Nigro V, Simeone A, Boncinelli E | title = The human HOX gene family | journal = Nucleic Acids Research | volume = 17 | issue = 24 | pages = 10385–402 | date = Dec 1989 | pmid = 2574852 | pmc = 335308 | doi = 10.1093/nar/17.24.10385 }}
*{{cite journal | author=Peverali FA, D'Esposito M, Acampora D, ''et al.'' |title=Expression of HOX homeogenes in human neuroblastoma cell culture lines. |journal=Differentiation |volume=45 |issue= 1 |pages= 61-9 |year= 1991 |pmid= 1981366 |doi= }}
* {{cite journal | vauthors = Boncinelli E, Acampora D, Pannese M, D'Esposito M, Somma R, Gaudino G, Stornaiuolo A, Cafiero M, Faiella A, Simeone A | title = Organization of human class I homeobox genes | journal = Genome / National Research Council Canada = Génome / Conseil National De Recherches Canada | volume = 31 | issue = 2 | pages = 745–56 | year = 1990 | pmid = 2576652 | doi = 10.1139/g89-133 }}
*{{cite journal | author=Giampaolo A, Acampora D, Zappavigna V, ''et al.'' |title=Differential expression of human HOX-2 genes along the anterior-posterior axis in embryonic central nervous system. |journal=Differentiation |volume=40 |issue= 3 |pages= 191-7 |year= 1989 |pmid= 2570724 |doi= }}
* {{cite journal | vauthors = Murphy PD, Ferguson-Smith AC, Miki T, Feinberg AA, Ruddle FH, Kidd KK | title = A moderately frequent RFLP identified by both SacI and BanII with a probe from the HOX2 locus in man (17q11-17q22) | journal = Nucleic Acids Research | volume = 15 | issue = 15 | pages = 6311 | date = Aug 1987 | pmid = 2888083 | pmc = 306101 | doi = 10.1093/nar/15.15.6311 }}
*{{cite journal | author=Shen WF, Largman C, Lowney P, ''et al.'' |title=Lineage-restricted expression of homeobox-containing genes in human hematopoietic cell lines. |journal=Proc. Natl. Acad. Sci. U.S.A. |volume=86 |issue= 21 |pages= 8536-40 |year= 1989 |pmid= 2573064 |doi= }}
* {{cite journal | vauthors = Levine M, Rubin GM, Tjian R | title = Human DNA sequences homologous to a protein coding region conserved between homeotic genes of Drosophila | journal = Cell | volume = 38 | issue = 3 | pages = 667–73 | date = Oct 1984 | pmid = 6091895 | doi = 10.1016/0092-8674(84)90261-7 }}
*{{cite journal | author=Acampora D, D'Esposito M, Faiella A, ''et al.'' |title=The human HOX gene family. |journal=Nucleic Acids Res. |volume=17 |issue= 24 |pages= 10385-402 |year= 1990 |pmid= 2574852 |doi= }}
* {{cite journal | vauthors = Chang CP, Shen WF, Rozenfeld S, Lawrence HJ, Largman C, Cleary ML | title = Pbx proteins display hexapeptide-dependent cooperative DNA binding with a subset of Hox proteins | journal = Genes & Development | volume = 9 | issue = 6 | pages = 663–74 | date = Mar 1995 | pmid = 7729685 | doi = 10.1101/gad.9.6.663 }}
*{{cite journal | author=Boncinelli E, Acampora D, Pannese M, ''et al.'' |title=Organization of human class I homeobox genes. |journal=Genome |volume=31 |issue= 2 |pages= 745-56 |year= 1990 |pmid= 2576652 |doi= }}
* {{cite journal | vauthors = Castronovo V, Kusaka M, Chariot A, Gielen J, Sobel M | title = Homeobox genes: potential candidates for the transcriptional control of the transformed and invasive phenotype | journal = Biochemical Pharmacology | volume = 47 | issue = 1 | pages = 137–43 | date = Jan 1994 | pmid = 7906121 | doi = 10.1016/0006-2952(94)90447-2 }}
*{{cite journal | author=Murphy PD, Ferguson-Smith AC, Miki T, ''et al.'' |title=A moderately frequent RFLP identified by both SacI and BanII with a probe from the HOX2 locus in man (17q11-17q22). |journal=Nucleic Acids Res. |volume=15 |issue= 15 |pages= 6311 |year= 1987 |pmid= 2888083 |doi= }}
* {{cite journal | vauthors = Apiou F, Flagiello D, Cillo C, Malfoy B, Poupon MF, Dutrillaux B | title = Fine mapping of human HOX gene clusters | journal = Cytogenetics and Cell Genetics | volume = 73 | issue = 1-2 | pages = 114–5 | year = 1996 | pmid = 8646877 | doi = 10.1159/000134320 }}
*{{cite journal | author=Levine M, Rubin GM, Tjian R |title=Human DNA sequences homologous to a protein coding region conserved between homeotic genes of Drosophila. |journal=Cell |volume=38 |issue= 3 |pages= 667-73 |year= 1984 |pmid= 6091895 |doi= }}
* {{cite journal | vauthors = Sawcer S, Jones HB, Feakes R, Gray J, Smaldon N, Chataway J, Robertson N, Clayton D, Goodfellow PN, Compston A | title = A genome screen in multiple sclerosis reveals susceptibility loci on chromosome 6p21 and 17q22 | journal = Nature Genetics | volume = 13 | issue = 4 | pages = 464–8 | date = Aug 1996 | pmid = 8696343 | doi = 10.1038/ng0896-464 }}
*{{cite journal | author=Chang CP, Shen WF, Rozenfeld S, ''et al.'' |title=Pbx proteins display hexapeptide-dependent cooperative DNA binding with a subset of Hox proteins. |journal=Genes Dev. |volume=9 |issue= 6 |pages= 663-74 |year= 1995 |pmid= 7729685 |doi= }}
* {{cite journal | vauthors = Zimmermann F, Rich IN | title = Mammalian homeobox B6 expression can be correlated with erythropoietin production sites and erythropoiesis during development, but not with hematopoietic or nonhematopoietic stem cell populations | journal = Blood | volume = 89 | issue = 8 | pages = 2723–35 | date = Apr 1997 | pmid = 9108390 | doi =  }}
*{{cite journal | author=Castronovo V, Kusaka M, Chariot A, ''et al.'' |title=Homeobox genes: potential candidates for the transcriptional control of the transformed and invasive phenotype. |journal=Biochem. Pharmacol. |volume=47 |issue= 1 |pages= 137-43 |year= 1994 |pmid= 7906121 |doi= }}
* {{cite journal | vauthors = Vider BZ, Zimber A, Hirsch D, Estlein D, Chastre E, Prevot S, Gespach C, Yaniv A, Gazit A | title = Human colorectal carcinogenesis is associated with deregulation of homeobox gene expression | journal = Biochemical and Biophysical Research Communications | volume = 232 | issue = 3 | pages = 742–8 | date = Mar 1997 | pmid = 9126347 | doi = 10.1006/bbrc.1997.6364 }}
*{{cite journal | author=Apiou F, Flagiello D, Cillo C, ''et al.'' |title=Fine mapping of human HOX gene clusters. |journal=Cytogenet. Cell Genet. |volume=73 |issue= 1-2 |pages= 114-5 |year= 1996 |pmid= 8646877 |doi=  }}
* {{cite journal | vauthors = Ohnishi K, Tobita T, Sinjo K, Takeshita A, Ohno R | title = Modulation of homeobox B6 and B9 genes expression in human leukemia cell lines during myelomonocytic differentiation | journal = Leukemia & Lymphoma | volume = 31 | issue = 5-6 | pages = 599–608 | date = Nov 1998 | pmid = 9922051 | doi = 10.3109/10428199809057620 }}
*{{cite journal | author=Sawcer S, Jones HB, Feakes R, ''et al.'' |title=A genome screen in multiple sclerosis reveals susceptibility loci on chromosome 6p21 and 17q22. |journal=Nat. Genet. |volume=13 |issue= 4 |pages= 464-8 |year= 1996 |pmid= 8696343 |doi= 10.1038/ng0896-464 }}
* {{cite journal | vauthors = Fienberg AA, Nordstedt C, Belting HG, Czernik AJ, Nairn AC, Gandy S, Greengard P, Ruddle FH | title = Phylogenetically conserved CK-II phosphorylation site of the murine homeodomain protein Hoxb-6 | journal = The Journal of Experimental Zoology | volume = 285 | issue = 1 | pages = 76–84 | date = Apr 1999 | pmid = 10327653 | doi = 10.1002/(SICI)1097-010X(19990415)285:1<76::AID-JEZ9>3.0.CO;2-K }}
*{{cite journal | author=Zimmermann F, Rich IN |title=Mammalian homeobox B6 expression can be correlated with erythropoietin production sites and erythropoiesis during development, but not with hematopoietic or nonhematopoietic stem cell populations. |journal=Blood |volume=89 |issue= 8 |pages= 2723-35 |year= 1997 |pmid= 9108390 |doi= }}
* {{cite journal | vauthors = Vider BZ, Zimber A, Chastre E, Gespach C, Halperin M, Mashiah P, Yaniv A, Gazit A | title = Deregulated expression of homeobox-containing genes, HOXB6, B8, C8, C9, and Cdx-1, in human colon cancer cell lines | journal = Biochemical and Biophysical Research Communications | volume = 272 | issue = 2 | pages = 513–8 | date = Jun 2000 | pmid = 10833444 | doi = 10.1006/bbrc.2000.2804 }}
*{{cite journal | author=Vider BZ, Zimber A, Hirsch D, ''et al.'' |title=Human colorectal carcinogenesis is associated with deregulation of homeobox gene expression. |journal=Biochem. Biophys. Res. Commun. |volume=232 |issue= 3 |pages= 742-8 |year= 1997 |pmid= 9126347 |doi= 10.1006/bbrc.1997.6364 }}
*{{cite journal | author=Ohnishi K, Tobita T, Sinjo K, ''et al.'' |title=Modulation of homeobox B6 and B9 genes expression in human leukemia cell lines during myelomonocytic differentiation. |journal=Leuk. Lymphoma |volume=31 |issue= 5-6 |pages= 599-608 |year= 1999 |pmid= 9922051 |doi=  }}
*{{cite journal  | author=Fienberg AA, Nordstedt C, Belting HG, ''et al.'' |title=Phylogenetically conserved CK-II phosphorylation site of the murine homeodomain protein Hoxb-6. |journal=J. Exp. Zool. |volume=285 |issue= 1 |pages= 76-84 |year= 1999 |pmid= 10327653 |doi=  }}
*{{cite journal | author=Vider BZ, Zimber A, Chastre E, ''et al.'' |title=Deregulated expression of homeobox-containing genes, HOXB6, B8, C8, C9, and Cdx-1, in human colon cancer cell lines. |journal=Biochem. Biophys. Res. Commun. |volume=272 |issue= 2 |pages= 513-8 |year= 2000 |pmid= 10833444 |doi= 10.1006/bbrc.2000.2804 }}
}}
{{refend}}
{{refend}}


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{{NLM content}}
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{{Transcription factors}}
{{PDB Gallery|geneid=3216}}
{{Transcription factors|g3}}
 
[[Category:Transcription factors]]
[[Category:Transcription factors]]
{{WikiDoc Sources}}

Latest revision as of 01:52, 27 October 2017

VALUE_ERROR (nil)
Identifiers
Aliases
External IDsGeneCards: [1]
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

n/a

n/a

RefSeq (protein)

n/a

n/a

Location (UCSC)n/an/a
PubMed searchn/an/a
Wikidata
View/Edit Human

Homeobox protein Hox-B6 is a protein that in humans is encoded by the HOXB6 gene.[1][2][3]

Function

This gene is a member of the Antp homeobox family and encodes a protein with a homeobox DNA-binding domain. It is included in a cluster of homeobox B genes located on chromosome 17. The encoded protein functions as a sequence-specific transcription factor that is involved in development, including that of lung and skin, and has been localized to both the nucleus and cytoplasm. Altered expression of this gene or a change in the subcellular localization of its protein is associated with some cases of acute myeloid leukemia and colorectal cancer.[3]

During development

HOX B6 gene is only expressed in erythoid progenitor cells, which are the precursor to red blood cells used for transport of oxygen and carbon dioxide throughout the body. During development, the formation of the HOX gene factor happens in the first stages of fetal development, namely soon after the establishment of the mesoderm, which is the “middle layer” of the future embryo. However, HOX B6 is only expressed once the undifferentiated stem cells of the embryo distinguish themselves into the erythpoietic phase. The research has shown that HOX B6 is not expressed in hematopoietic stem cells located in the red bone marrow, which are the precursor cells to all types of blood cells, or primordial germ cells (PGCs), the precursor to cells passed on in each generation.[4] Since it is a transcriptional factor, HOX B6 regulates erythpoigenesis (red blood cell formation) using mRNA as the basis for certain protein productions. The specific gene factor for erytopoigenesis has relatively been unobserved in the scientific community, and no known diseases have been associated with a defect HOX B6 gene. However, it has been shown in correlation with major skeletal deformations.[5]

HOXB6 is a structural protein that has been shown to influence the growth and differentiation of the different blood lineages. This gene has also been shown to encourage the growth of granulocytes and monocytes, but at the cost of other blood cells. HOXB6 has the ability to cause the indefinite proliferation of murine marrow cells, as well as expand hematopoietic stem cells. When expressed abnormally, HOXB6 displays many characteristics of a potent oncoprotein. An oncoprotein can cause the transformation of a normal cell into a tumor cell. Overexpression of HOXB6, along with the addition of MEIS1 protein, has been implicated in the development of acute myeloid leukemia (AML). Acute myeloid leukemia is a cancer of the blood cells, specifically the leukocytes. The chromosomal irregularity most frequently seen in HOXB6 AML is a reappearing interstitial deletion of chromosome 2. Fundamental HOXB6 expression stops myeloid differentiation and debilitates erythropoiesis, megakaryopoiesis, and lymphopoiesis.[6]

See also

References

  1. McAlpine PJ, Shows TB (Jul 1990). "Nomenclature for human homeobox genes". Genomics. 7 (3): 460. doi:10.1016/0888-7543(90)90186-X. PMID 1973146.
  2. Scott MP (Nov 1992). "Vertebrate homeobox gene nomenclature". Cell. 71 (4): 551–3. doi:10.1016/0092-8674(92)90588-4. PMID 1358459.
  3. 3.0 3.1 "Entrez Gene: HOXB6 homeobox B6".
  4. Zimmermann F, Rich IN (Apr 1997). "Mammalian homeobox B6 expression can be correlated with erythropoietin production sites and erythropoiesis during development, but not with hematopoietic or nonhematopoietic stem cell populations". Blood. 89 (8): 2723–35. PMID 9108390.
  5. Rancourt DE, Tsuzuki T, Capecchi MR (Jan 1995). "Genetic interaction between hoxb-5 and hoxb-6 is revealed by nonallelic noncomplementation". Genes & Development. 9 (1): 108–22. doi:10.1101/gad.9.1.108. PMID 7828847.
  6. Fischbach NA, Rozenfeld S, Shen W, Fong S, Chrobak D, Ginzinger D, Kogan SC, Radhakrishnan A, Le Beau MM, Largman C, Lawrence HJ (2005). "HOXB6 overexpression in murine bone marrow immortalizes a myelomonocytic precursor in vitro and causes hematopoietic stem cell expansion and acute myeloid leukemia in vivo". Blood. 105 (4): 1456–66. doi:10.1182/blood-2004-04-1583. PMID 15522959.

Further reading

External links

This article incorporates text from the United States National Library of Medicine, which is in the public domain.