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Details on Person UniProt:P55157 MTTP

Class:IdReferenceGeneProduct:59673
_chainChangeLogsignal peptide:1-18 added on Fri February 6 2015;chain:19-894 added on Fri February 6 2015
_displayNameUniProt:P55157 MTTP
_timestamp2024-11-03 20:10:54
chainsignal peptide:1-18
chain:19-894
checksumB20260C136BDAB9F
commentFUNCTION Catalyzes the transport of triglyceride, cholesteryl ester, and phospholipid between phospholipid surfaces (PubMed:15897609, PubMed:16478722, PubMed:22236406, PubMed:23475612, PubMed:25108285, PubMed:26224785, PubMed:8876250, PubMed:8939939). Required for the assembly and secretion of plasma lipoproteins that contain apolipoprotein B (PubMed:16478722, PubMed:23475612, PubMed:26224785, PubMed:8876250, PubMed:8939939). May be involved in regulating cholesteryl ester biosynthesis in cells that produce lipoproteins (By similarity).CATALYTIC ACTIVITY a 1,2-diacyl-sn-glycero-3-phosphocholine(in) = a 1,2-diacyl-sn-glycero-3-phosphocholine(out)CATALYTIC ACTIVITY a 1,2-diacyl-sn-glycero-3-phosphoethanolamine(in) = a 1,2-diacyl-sn-glycero-3-phosphoethanolamine(out)CATALYTIC ACTIVITY a cholesterol ester(in) = a cholesterol ester(out)CATALYTIC ACTIVITY a triacyl-sn-glycerol(in) = a triacyl-sn-glycerol(out)SUBUNIT Heterodimer; heterodimerizes with the protein disulfide isomerase (P4HB/PDI) (PubMed:16478722, PubMed:23475612, PubMed:25108285, PubMed:26224785). Interacts with APOB (PubMed:25108285, PubMed:26224785, PubMed:27206948). Interacts with PRAP1 (By similarity).INTERACTION Colocalizes with P4HB/PDI in the endoplasmic reticulum (PubMed:23475612, PubMed:26224785).ALTERNATIVE PRODUCTS Liver and small intestine. Also found in ovary, testis and kidney.INDUCTION Positively regulated by cholesterol and negatively regulated by insulin.DISEASE The disease is caused by variants affecting the gene represented in this entry.
descriptionrecommendedName: Microsomal triglyceride transfer protein large subunit
geneNameMTTP
MTP
identifierP55157
isSequenceChangedFALSE
keyword3D-structure
Alternative splicing
Disease variant
Disulfide bond
Endoplasmic reticulum
Golgi apparatus
Lipid transport
Lipid-binding
Proteomics identification
Reference proteome
Signal
Transport
modified[InstanceEdit:9836292] Weiser, Joel, 2023-05-25
[InstanceEdit:9852000] Weiser, Joel, 2023-11-03
[InstanceEdit:9917590] Weiser, Joel, 2024-08-09
[InstanceEdit:9926675] Weiser, Joel, 2024-11-03
nameMTTP
referenceDatabase[ReferenceDatabase:2] UniProt
referenceGene[ReferenceDNASequence:8998451] ENSEMBL:ENSG00000138823 MTTP [Homo sapiens]
secondaryIdentifierMTP_HUMAN
A8K428
Q08AM4
Q6P5T3
sequenceLength894
species[Species:48887] Homo sapiens
(isoformParent)[ReferenceIsoform:8975652] UniProt:P55157-1 MTTP [Homo sapiens]
[ReferenceIsoform:8975653] UniProt:P55157-2 MTTP [Homo sapiens]
(referenceEntity)[EntityWithAccessionedSequence:174688] MTTP [endoplasmic reticulum lumen] [Homo sapiens]
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No pathways have been reviewed or authored by UniProt:P55157 MTTP (59673)