ABCB4

From Wikipedia, the free encyclopedia
ABCB4
Identifiers
AliasesABCB4, ABC21, GBD1, ICP3, MDR2, MDR2/3, MDR3, PFIC-3, PGY3, ATP binding cassette subfamily B member 4
External IDsOMIM: 171060 MGI: 97569 HomoloGene: 136368 GeneCards: ABCB4
EC number7.6.2.2
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_000443
NM_018849
NM_018850

NM_008830

RefSeq (protein)

NP_000434
NP_061337
NP_061338

NP_032856

Location (UCSC)Chr 7: 87.4 – 87.48 MbChr 5: 8.94 – 9.01 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse

The ATP-binding cassette 4 gene encodes the Multidrug resistance protein 3.[5][6][7] ABCB4 is associated with progressive familial intrahepatic cholestasis type 3.

The membrane-associated protein encoded by this gene is a member of the superfamily of ATP-binding cassette (ABC) transporters. ABC proteins transport various molecules across extra- and intra-cellular membranes. ABC genes are divided into seven distinct subfamilies (ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, White). This protein is a member of the MDR/TAP subfamily. Members of the MDR/TAP subfamily are involved in multidrug resistance as well as antigen presentation. This gene encodes a full transporter and member of the p-glycoprotein family of membrane proteins with phosphatidylcholine as its substrate (flippase activity). The function of this protein has not yet been determined; however, it may involve transport of phospholipids from liver hepatocytes into bile. Alternative splicing of this gene results in several products of undetermined function.[7]

Cancer[]

ABCB4 gene has been observed progressively downregulated in Human papillomavirus-positive neoplastic keratinocytes derived from uterine cervical preneoplastic lesions at different levels of malignancy. [8] For this reason, ABCB4 is likely to be associated with tumorigenesis and may be a potential prognostic marker for uterine cervical preneoplastic lesions progression.[8]

Other conditions that have been associated with mutations in this gene include , high gamma glutamyl transferase intrahepatic cholestasis of pregnancy, chronic cholangiopathy and adult biliary fibrosis.[9]

References[]

  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000005471 - Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000042476 - Ensembl, May 2017
  3. ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. ^ Van der Bliek AM, Baas F, Ten Houte de Lange T, Kooiman PM, Van der Velde-Koerts T, Borst P (Mar 1988). "The human mdr3 gene encodes a novel P-glycoprotein homologue and gives rise to alternatively spliced mRNAs in liver". The EMBO Journal. 6 (11): 3325–31. PMC 553787. PMID 2892668.
  6. ^ Rosmorduc O, Hermelin B, Poupon R (Apr 2001). "MDR3 gene defect in adults with symptomatic intrahepatic and gallbladder cholesterol cholelithiasis". Gastroenterology. 120 (6): 1459–67. doi:10.1053/gast.2001.23947. PMID 11313316.
  7. ^ a b "Entrez Gene: ABCB4 ATP-binding cassette, sub-family B (MDR/TAP), member 4".
  8. ^ a b Rotondo JC, Bosi S, Bassi C, Ferracin M, Lanza G, Gafà R, Magri E, Selvatici R, Torresani S, Marci R, Garutti P, Negrini M, Tognon M, Martini F (April 2015). "Gene expression changes in progression of cervical neoplasia revealed by microarray analysis of cervical neoplastic keratinocytes". J Cell Physiol. 230 (4): 802–812. doi:10.1002/jcp.24808. PMID 25205602. S2CID 24986454.
  9. ^ Sticova E, Jirsa M (2019) ABCB4 disease: Many faces of one gene deficiency. Ann Hepatol

Further reading[]

External links[]


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