| MF | EXP | GO:0004674 | protein serine/threonine kinase activity |
| MF | IDA | GO:0004674 | protein serine/threonine kinase activity |
| MF | TAS | GO:0004674 | protein serine/threonine kinase activity |
| MF | NAS | GO:0004675 | transmembrane receptor protein serine/threonine kinase activity |
| MF | IBA | GO:0005024 | transforming growth factor beta-activated receptor activity |
| MF | IBA | GO:0005025 | transforming growth factor beta receptor activity, type I |
| MF | IPI | GO:0005515 | protein binding |
| MF | IDA | GO:0005524 | ATP binding |
| MF | IDA | GO:0016361 | activin receptor activity, type I |
| MF | TAS | GO:0016361 | activin receptor activity, type I |
| MF | IDA | GO:0017002 | activin-activated receptor activity |
| MF | IBA | GO:0019838 | growth factor binding |
| MF | IPI | GO:0019838 | growth factor binding |
| MF | NAS | GO:0031625 | ubiquitin protein ligase binding |
| MF | IPI | GO:0034711 | inhibin binding |
| MF | IBA | GO:0046332 | SMAD binding |
| MF | IDA | GO:0046332 | SMAD binding |
| MF | IEA | GO:0046872 | metal ion binding |
| MF | IBA | GO:0048185 | activin binding |
| MF | IBA | GO:0048185 | activin binding |
| MF | IDA | GO:0048185 | activin binding |
| CC | IDA | GO:0005829 | cytosol |
| CC | TAS | GO:0005886 | plasma membrane |
| CC | IBA | GO:0005887 | integral component of plasma membrane |
| CC | IDA | GO:0005887 | integral component of plasma membrane |
| CC | IDA | GO:0009986 | cell surface |
| CC | IBA | GO:0043235 | receptor complex |
| CC | IDA | GO:0043235 | receptor complex |
| CC | IBA | GO:0048179 | activin receptor complex |
| CC | IDA | GO:0048179 | activin receptor complex |
| BP | IDA | GO:0000082 | G1/S transition of mitotic cell cycle |
| BP | IEA | GO:0001701 | in utero embryonic development |
| BP | IEA | GO:0001942 | hair follicle development |
| BP | IDA | GO:0006355 | regulation of transcription, DNA-templated |
| BP | IDA | GO:0006468 | protein phosphorylation |
| BP | IDA | GO:0007165 | signal transduction |
| BP | TAS | GO:0007178 | transmembrane receptor protein serine/threonine kinase signaling pathway |
| BP | IBA | GO:0007179 | transforming growth factor beta receptor signaling pathway |
| BP | IBA | GO:0007389 | pattern specification process |
| BP | IEA | GO:0007417 | central nervous system development |
| BP | IEA | GO:0010629 | negative regulation of gene expression |
| BP | IEA | GO:0010862 | positive regulation of pathway-restricted SMAD protein phosphorylation |
| BP | IDA | GO:0018107 | peptidyl-threonine phosphorylation |
| BP | IDA | GO:0030308 | negative regulation of cell growth |
| BP | IBA | GO:0032924 | activin receptor signaling pathway |
| BP | IDA | GO:0032924 | activin receptor signaling pathway |
| BP | IMP | GO:0032924 | activin receptor signaling pathway |
| BP | IDA | GO:0032927 | positive regulation of activin receptor signaling pathway |
| BP | IGI | GO:0038092 | nodal signaling pathway |
| BP | IDA | GO:0045648 | positive regulation of erythrocyte differentiation |
| BP | IEA | GO:0045944 | positive regulation of transcription by RNA polymerase II |
| BP | IEA | GO:0046545 | development of primary female sexual characteristics |
| BP | IDA | GO:0046777 | protein autophosphorylation |
| BP | IMP | GO:0097191 | extrinsic apoptotic signaling pathway |
| BP | IDA | GO:1901165 | positive regulation of trophoblast cell migration |