Microsomal triglyceride transfer protein

Microsomal triglyceride transfer protein

Microsomal triglyceride transfer protein
Symbols  ; ABL; MTP
External IDs ChEMBL: GeneCards:
RNA expression pattern
Species Human Mouse
RefSeq (mRNA)
RefSeq (protein)
Location (UCSC)
PubMed search

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]

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


  • Interactive pathway map 1
  • Pharmacology 2
  • References 3
  • Further reading 4

Interactive pathway map

Click on genes, proteins and metabolites below to link to respective articles. [§ 1]

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Statin Pathway edit
  1. ^ The interactive pathway map can be edited at WikiPathways: "Statin_Pathway_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.  
  2. ^ a b "Entrez Gene: MTTP microsomal triglyceride transfer protein". 

Further reading

  • Luz JM, Lennarz WJ (1996). "Protein disulfide isomerase: a multifunctional protein of the endoplasmic reticulum.". EXS 77: 97–117.  
  • Wetterau JR, Lin MC, Jamil H (1997). "Microsomal triaglyceride transfer protein.". Biochim. Biophys. Acta 1345 (2): 136–50.  
  • Gordon DA (1997). "Recent advances in elucidating the role of the microsomal triaglyceride transfer protein in apolipoprotein B lipoprotein assembly.". Curr. Opin. Lipidol. 8 (3): 131–7.  
  • Ye J (2007). "Reliance of Host Cholesterol Metabolic Pathways for the Life Cycle of Hepatitis C Virus". PLoS Pathog. 3 (8): e108.  
  • Wetterau JR, Aggerbeck LP, Bouma ME, et al. (1992). "Absence of microsomal triaglyceride transfer protein in individuals with abetalipoproteinemia". Science 258 (5084): 999–1001.  
  • Sharp D, Ricci B, Kienzle B, et al. (1994). "Human microsomal triaglyceride transfer protein large subunit gene structure". Biochemistry 33 (31): 9057–61.  
  • Shoulders CC, Narcisi TM, Read J, et al. (1995). "The abetalipoproteinemia gene is a member of the vitellogenin family and encodes an alpha-helical domain". Nat. Struct. Biol. 1 (5): 285–6.  
  • Hagan DL, Kienzle B, Jamil H, Hariharan N (1994). "Transcriptional regulation of human and hamster microsomal triaglyceride transfer protein genes. Cell type-specific expression and response to metabolic regulators". J. Biol. Chem. 269 (46): 28737–44.  
  • Maruyama K, Sugano S (1994). "Oligo-capping: a simple method to replace the cap structure of eukaryotic mRNAs with oligoribonucleotides". Gene 138 (1–2): 171–4.  
  • Sharp D, Blinderman L, Combs KA, et al. (1993). "Cloning and gene defects in microsomal triaglyceride transfer protein associated with abetalipoproteinaemia". Nature 365 (6441): 65–9.  
  • Narcisi TM, Shoulders CC, Chester SA, et al. (1996). "Mutations of the Microsomal Triglyceride-Transfer–Protein Gene in Abetalipoproteinemia". Am. J. Hum. Genet. 57 (6): 1298–310.  
  • Rehberg EF, Samson-Bouma ME, Kienzle B, et al. (1997). "A novel abetalipoproteinemia genotype. Identification of a missense mutation in the 97-kDa subunit of the microsomal triaglyceride transfer protein that prevents complex formation with protein disulfide isomerase". J. Biol. Chem. 271 (47): 29945–52.  
  • Suzuki Y, Yoshitomo-Nakagawa K, Maruyama K, et al. (1997). "Construction and characterization of a full length-enriched and a 5'-end-enriched cDNA library". Gene 200 (1–2): 149–56.  
  • Linnik KM, Herscovitz H (1998). "Multiple molecular chaperones interact with apolipoprotein B during its maturation. The network of endoplasmic reticulum-resident chaperones (ERp72, GRP94, calreticulin, and BiP) interacts with apolipoprotein b regardless of its lipidation state". J. Biol. Chem. 273 (33): 21368–73.  
  • Bradbury P, Mann CJ, Köchl S, et al. (1999). "A common binding site on the microsomal triaglyceride transfer protein for apolipoprotein B and protein disulfide isomerase". J. Biol. Chem. 274 (5): 3159–64.  
  • Wang J, Hegele RA (2000). "Microsomal triaglyceride transfer protein (MTP) gene mutations in Canadian subjects with abetalipoproteinemia". Hum. Mutat. 15 (3): 294–5.