Recombinant Human Probable phospholipid-transporting ATPase IC (ATP8B1), partial

1. FIC1, BSEP, and MDR3 represent hepatobiliary transport proteins essential for bile formation. PMID: 28733223
2. ATP8B1 deficiency caused incomplete polarization of human peripheral blood monocyte-derived macrophages into M2c, a subset alternatively activated macrophages. PMID: 29104077
3. Patients with a confirmed ABCB11 or tight junction protein 2 gene mutation (n = 7) had a minimally detectable THBA proportion (0.23-2.99% of total BAs). Three patients with an ATP8B1 mutation had an elevated THBA proportion (7.51-37.26%). PMID: 28073941
4. the first characterisation at the protein level of six ABCB4 variants (D243A, K435T, G535D, I490T, R545C, and S978P) previously found in patients with inflammatory liver diseases or liver cancer, is reported. PMID: 28220208
5. The lipid flippases, ATP8B1 and ATP11A are novel elements of the innate immune response that are essential to attenuate the inflammatory response, possibly by mediating endotoxin-induced internalization of TLR4. PMID: 27628304
6. ATP8B1 is important for proper CFTR expression and function. PMID: 27301931
7. GGT levels in patients with ATP8B1 or ABCB11 deficiency varied with age. The peak GGT value was <70U/L in the 2nd~6th month of life, <60U/L in the 7th~12th month and <50U/L beyond one year PMID: 27050426
8. As hypothyroidism can be another extrahepatic feature of ATP8B1 deficiency, thyroid function should be monitored in these patients. PMID: 26382629
9. the predominant P4 ATPases in pure pancreatic beta cells and human and rat pancreatic islets were ATP8B1, ATP8B2, and ATP9A. ATP8B1 and CDC50A were highly concentrated in ISG PMID: 26240149
10. insufficient activity of Atp8b1/FIC1 increases susceptibility to bacterial pneumonia. PMID: 26050466
11. We systematically characterized the molecular consequences of 14 ATP8B1 mutations at exon-intron boundaries associated with ATP8B1 deficiency and found that the majority resulted in total exon skipping PMID: 25421123
12. Data indicate that the lipid flippase (ATP8B1)-transmembrane protein 30A (CDC50A) heterodimer is essential for the apical localization of sodium-dependent bile acid transporter (SLC10A2/ASBT) in Caco-2 cells. PMID: 25239307
13. We did not find an association between heterozygous ATP8B1 variants and chronic pancreatitis in our cohort of patients with hereditary and idiopathic chronic pancreatitis. PMID: 24260417
14. Case Report: suggest contribution of ATP8B1 mutations to drug-induced liver injury from anabolic androgenic steroids marketed as dietary supplements. PMID: 23750872
15. Case Report: missense ATP8B1 mutation in adult male with progressive familial intrahepatic cholestasis type 1. PMID: 23197899
16. Novel splice-site mutation in ATP8B1 results in atypical progressive familial intrahepatic cholestasis type 1. PMID: 23033845
17. FIC1 signals to FXR via a signaling pathway including PLD2 and PKCzeta PMID: 23213138
18. The basal expression of ATP8B1 is driven by a housekeeping-like promoter located 71 kb upstream of the first protein coding exon, and is independent of bile acids and farnesoid X receptor. PMID: 23251605
19. Biochemical analysis of P4-ATPase mutations identified in patients with progressive familial intrahepatic cholestasis PMID: 23060447
20. Sequence analysis of the genes identified 27% cholestasis subjects with missense, nonsense, deletion, and splice site variants associated with disease phenotypes based on the type of mutation in the JAG1, ATP8B1, ABCB11, or ABCB4 genes. PMID: 20683201
21. results unveil a new paradigm whereby Atp8b1 is a cardiolipin importer whose capacity to remove cardiolipin from lung fluid is exceeded during inflammation or when Atp8b1 is defective PMID: 20852622
22. facilitating diagnosis and elucidating the differing consequences of ATP8B1 and ABCB11 mutations in progressive familial intrahepatic cholestasis PMID: 20447715
23. Data identified three novel mutations in BSEP, one novel mutation in MDR3, and one heterozygous mutation in ATP8B1 in PFIC patients. PMID: 20414253
24. We now report evidence that heterozygous genetically determined alteration of ATP8B1 (encoding FIC1) may also represent a risk factor for transient neonatal cholestasis. PMID: 20216097
25. critical role in apical membrane organization that is unrelated to its presumed aminophospholipid translocase activity PMID: 20512993
26. ATP8B1 gene mutations play an important role in Chinese patients with progressive intrahepatic cholestasis and low gamma-glutamyltransferase. The linked mutation P209T and IVS6+5G>T is a hot mutation in the Chinese population. PMID: 20038848
27. Progressive familial intrahepatic cholestasis types 1 & 2 differ clinically, biochemically, and histologically at presentation and/or during the disease course. A small proportion of normal-GGT PFIC is likely not due to ATP8B1 or ABCB11 mutations. PMID: 20232290
28. Findings support the hypothesis that hepatocyte FIC1 enhances FXR signaling via a PKCzeta-dependent signaling pathway. PMID: 19809379
29. A surprisingly large proportion of ATP8B1 mutations resulted in aberrant folding and decreased expression at the plasma membrane. These effects were partially restored by treatment with 4-phenylbutyrate. PMID: 19918981
30. three homologues found and two sequenced and two RNA transcript sizes analysed by northern blot: APT8B2, APT8B3, APT8B4 PMID: 12880872
31. Loss of familial intrahepatic cholestasis-1 leads to diminished nuclear translocation of farnesoid X receptor(FXR), with subsequent potential for pathologic alterations in intestinal and hepatic bile acid transporter expression PMID: 14988830
32. 54 distinct disease mutations: 10 mutations predicted to disrupt splicing, 6 nonsense mutations, 11 small insertion or deletion mutations predicted to induce frameshifts, 1 large genomic deletion, 2 small inframe deletions, and 24 missense mutations. PMID: 15239083
33. Coexpression with CDC50 proteins resulted in relocalization of ATP8B1 from the endoplasmic reticulum to the plasma membrane. In the plasma membrane, ATP8B1 functions as a flippase for phosphatidylserine. PMID: 17948906
34. FIC1 signals to FXR via PKC zeta. FIC1-related liver disease is likely related to downstream effects of FXR on bile acid homeostasis. PMID: 18668687
35. ATP8B1 deficiency predisposes to cholestasis by favoring bile acid-induced injury in the canalicular membrane but does not directly affect FXR expression PMID: 19027009
36. Knockdown of ATP8B1 expression leads to specific downregulation of the bile acid sensor FXR in HepG2 cells: effect of the FXR agonist GW4064. PMID: 19228886
37. These results suggest that the PFIC1 mutants have a lower stimulatory effect on FXR activity and cannot interact with CDC50A, which may lead to the development of the features of PFIC1. PMID: 19381753
38. show that ATP8B1/Atp8b1 deficiency, both in patients and in Atp8b1(G308V/G308V) mutant mice, causes hearing loss, associated with progressive degeneration of cochlear hair cells PMID: 19478059
39. Post-liver transplantation steatosis may be due to a malfunction of the ATP8B1 product. PMID: 19479804
40. PFIC1 mutations lead to the complete absence of canalicular expression, whereas in BRIC1/ICP residual protein is expressed in the canalicular membrane. PMID: 19731236

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HGNC: 3706

OMIM: 147480

KEGG: hsa:5205

STRING: 9606.ENSP00000283684

UniGene: Hs.216623