Inhibin alpha chain
Matched no rule. Shown as-is rather than assigned a class by guesswork. Values below are reported as measured; because this is not a molecular target, they are not treated as affinities anywhere on this site.
- Measurements
- 1
- Compounds
- 1
- Binding constants
- 0
- Median pX
- —
I · Identity
What this target is
Its function as UniProt states it, where in a cell the protein is found, and which cell types and tissues transcribe its gene.
Inhibin alpha chain
Inhibins and activins inhibit and activate, respectively, the secretion of follitropin by the pituitary gland. Inhibins/activins are involved in regulating a number of diverse functions such as hypothalamic and pituitary hormone secretion, gonadal hormone secretion, germ cell development and maturation, erythroid differentiation, insulin secretion, nerve cell survival, embryonic axial development or bone growth, depending on their subunit composition. Inhibins appear to oppose the functions of activins
Inhibin A is a dimer of alpha/INHA and beta-A/INHBA that functions as a feedback regulator in the hypothalamic-pituitary-gonadal (HPG) axis. Inhibits the secretion of FSH from the anterior pituitary gland by acting on pituitary gonadotrope cells. Antagonizes activin A by binding to the proteoglycan, betaglycan, and forming a stable complex with and, thereby, sequestering type II activin receptors while excluding type I receptor
Inhibin B is a dimer of alpha and beta-B that plays a crucial role in the regulation of the reproductive system by inhibiting the secretion of follicle-stimulating hormone (FSH) from the anterior pituitary gland. Thereby, maintains reproductive homeostasis in both males and females. Acts as a more potent suppressor of FSH release than inhibin A (By similarity). Functions as competitive receptor antagonist binding activin type II receptors with high affinity in the presence of the TGF-beta type III coreceptor/TGFBR3L34910520
Quoted from UniProt’s FUNCTION annotation for P05111 (reviewed). The superscript numbers are UniProt’s own PubMed citations, kept in the sentence and in order, each linking to the paper it names.
What it acts with
STRING’s highest-confidence human functional partners. The combined score mixes several kinds of evidence, so each channel is shown separately — a partner supported by experiment is a different claim from one supported only by text mining, and for a receptor this is where its coupling appears as evidence rather than as assertion.
Where it sits in the cell
- Vesicles
- Golgi apparatusadditional
Human Protein Atlas, by antibody immunofluorescence in cell lines — a different assay from the expression figures below, which are RNA.
UniProt, curated Secreted
Expression by cell type
Single cell type RNA, the 8 highest of those the Human Protein Atlas reports for this gene. Transcript, not protein, and a cell type rather than a tissue.
- Syncytiotrophoblasts444.4 nCPM
- Granulosa cells248.2 nCPM
- Cardiomyocytes105.5 nCPM
- Ovarian stromal cells67.9 nCPM
- Sertoli cells61.6 nCPM
- Extravillous trophoblasts60.8 nCPM
- Adrenal cortex cells48.3 nCPM
- Migrating cytotrophoblasts39.3 nCPM
Expression by tissue
The tissues this gene is enriched in, by consensus RNA. A tissue absent from this list is one the Atlas does not call specific for this gene, which is not the same as absent from it.
- ovary108.7 nTPM
- testis101.4 nTPM
- adrenal gland75.8 nTPM
IV · Evidence
Every measurement at this target
Each row links to the ChEMBL assay it came from.
Functional readouts 1
IC₅₀, EC₅₀, AC₅₀ and potency. Assay-dependent, and not interchangeable with a binding constant.
| Target | Class | Type | Value (nM) | pX | Organism | Assay |
|---|---|---|---|---|---|---|
| Inhibin alpha chain | Unclassified | IC50 | 5,200 | 5.28 | Homo sapiens | CHEMBL5096678 |