Activin receptor type 1B
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Other names: | ACTR-IB, Serine/threonine-protein kinase receptor R2, SKR2, Activin receptor-like kinase 4, ALK-4
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Genetic data
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Gene code: | HUGO code: ACVR1B
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Protein Structure/Function
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Protein type: | Serine/Threonine receptor kinase
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Domains: | GS domain, TS domain, S/T domain
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Other
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Taxa expressing: | Homo sapiens; homologs: many metazoan phyla
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Cell types: | ubiquitous
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Subcellular localization: | Plasma membrane
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Enzymatic Data
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Catalytic activity: | ATP + (receptor-protein) = ADP + (receptor-protein) phosphate
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Cofactor(s): | Magnesium or manganese
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Medical/Biotechnological data
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Diseases: | Pancreatic Carcinoma
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ACVR1B or ALK-4 acts as a transducer of Activin or activin like ligands (eg. Inhibin) signals. Activin binds to either ACVR2A or ACVR2B and then forms a complex with ACVR1B. These go on to recruit the R-SMADs SMAD2 or SMAD3.[1] ACVR1B also transduces signals of nodal, GDF-1, and Vg1; however, unlike activin, they require other coreceptor molecules such as the protein Cripto[2].
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Identifiers
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Symbol
| ACVR1B
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Alt. Symbols
| ACVRLK4
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Entrez
| 91
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HUGO
| 172
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OMIM
| 601300
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RefSeq
| NM_020328
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UniProt
| P36896
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Other data
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EC number
| 2.7.11.30
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Locus
| Chr. 12 q13
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References
- ^ Inman, GJ; Nicolas FJ, Callahan JF, Harling JD, Gaster LM, Reith AD, Laping NJ, Hill CS. (Jul 2002). "SB-431542 is a potent and specific inhibitor of transforming growth factor-beta superfamily type I activin receptor-like kinase (ALK) receptors ALK4, ALK5, and ALK7". Mol Pharmacol. 62 (1). Entrez PubMed 12065756. Retrieved on 2006-07-05.
- ^ Harrison, CA; Gray PC, Koerber SC, Fischer W, Vale W (Jun 2003). "Identification of a functional binding site for activin on the type I receptor ALK4". J Biol Chem. 278 (23). Entrez PubMed 12665502. Retrieved on 2006-07-05.
Cell signaling: TGF beta signaling pathway |
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TGF beta superfamily of ligands | TGF beta family (TGF-β1, TGF-β2, TGF-β3) Bone morphogenetic proteins (BMP2, BMP3, BMP4, BMP5, BMP6, BMP7, BMP8a, BMP8b, BMP10 , BMP15) Growth differentiation factors (GDF1, GDF2, GDF3, GDF5, GDF6, GDF7, Myostatin/GDF8, GDF9, GDF10, GDF11, GDF15) Other (Activin A and B/Inhibin A and B, Anti-müllerian hormone, Nodal) |
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TGF beta receptors | TGFBR1: Activin type 1 receptors (ACVR1, ACVR1B, ACVR1C) - ACVRL1 - BMPR1 (BMPR1A - BMPR1B) TGFBR2: Activin type 2 receptors (ACVR2A, ACVR2B) - AMHR2 - BMPR2 TGFBR3: betaglycan |
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Transducers/SMAD | R-SMAD (SMAD1, SMAD2, SMAD3, SMAD5, SMAD9) - I-SMAD (SMAD6, SMAD7) - SMAD4 |
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Ligand Inhibitors | Cerberus - Chordin - DAN - Decorin - Follistatin - Gremlin - Lefty - LTBP1 - Noggin - THBS1 |
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Coreceptors | BAMBI - Cripto |
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Other | SARA |
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