Microsomal triglyceride transfer protein

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Template:Infobox gene Microsomal triglyceride transfer protein large subunit is a protein that in humans is encoded by the MTTP gene.[1][2]

MTP encodes the large subunit of the heterodimeric microsomal triglyceride transfer protein. Protein disulfide isomerase (PDI) completes the heterodimeric microsomal triaglyceride transfer protein, which has been shown to play a central role in lipoprotein assembly. Mutations in MTP can cause abetalipoproteinemia.[2]

Apolipoprotein B48 on chylomicra and Apolipoprotein B100 on LDL, IDL, and VLDL are important for MTP binding.

Interactive pathway map

Template:StatinPathway WP430


Drugs that inhibit MTTP prevent the assembly of apo B-containing lipoproteins thus inhibiting the synthesis of chylomicrons and VLDL and leading to decrease in plasma levels of LDL-C.


  1. Shoulders CC, Brett DJ, Bayliss JD, Narcisi TM, Jarmuz A, Grantham TT, Leoni PR, Bhattacharya S, Pease RJ, Cullen PM, et al. (Mar 1994). "Abetalipoproteinemia is caused by defects of the gene encoding the 97 kDa subunit of a microsomal triglyceride transfer protein". Hum Mol Genet. 2 (12): 2109–16. PMID 8111381. doi:10.1093/hmg/2.12.2109. 
  2. 2.0 2.1 "Entrez Gene: MTTP microsomal triglyceride transfer protein". 

Further reading