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FSHB_PHOSU
ID   FSHB_PHOSU              Reviewed;         126 AA.
AC   Q9QYB0;
DT   01-DEC-2000, integrated into UniProtKB/Swiss-Prot.
DT   01-MAY-2000, sequence version 1.
DT   25-MAY-2022, entry version 68.
DE   RecName: Full=Follitropin subunit beta;
DE   AltName: Full=Follicle-stimulating hormone beta subunit;
DE            Short=FSH-B;
DE            Short=FSH-beta;
DE   AltName: Full=Follitropin beta chain;
DE   Flags: Precursor; Fragment;
GN   Name=FSHB;
OS   Phodopus sungorus (Striped hairy-footed hamster) (Djungarian hamster).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia;
OC   Eutheria; Euarchontoglires; Glires; Rodentia; Myomorpha; Muroidea;
OC   Cricetidae; Cricetinae; Phodopus.
OX   NCBI_TaxID=10044;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   TISSUE=Pituitary;
RX   PubMed=10611080; DOI=10.1095/biolreprod62.1.155;
RA   Bernard D.J., Merzlyak I.Y., Horton T.H., Turek F.W.;
RT   "Differential regulation of pituitary gonadotropin subunit messenger
RT   ribonucleic acid levels in photostimulated Siberian hamsters.";
RL   Biol. Reprod. 62:155-161(2000).
CC   -!- FUNCTION: Together with the alpha chain CGA constitutes follitropin,
CC       the follicle-stimulating hormone, and provides its biological
CC       specificity to the hormone heterodimer. Binds FSHR, a G protein-coupled
CC       receptor, on target cells to activate downstream signaling pathways.
CC       Follitropin is involved in follicle development and spermatogenesis in
CC       reproductive organs. {ECO:0000250|UniProtKB:P01225}.
CC   -!- SUBUNIT: Heterodimer. The active follitropin is a heterodimer composed
CC       of an alpha chain/CGA shared with other hormones and a unique beta
CC       chain/FSHB shown here. {ECO:0000250|UniProtKB:P01225}.
CC   -!- SUBCELLULAR LOCATION: Secreted {ECO:0000250|UniProtKB:P01225}.
CC       Note=Efficient secretion requires dimerization with CGA.
CC       {ECO:0000250|UniProtKB:P01225}.
CC   -!- SIMILARITY: Belongs to the glycoprotein hormones subunit beta family.
CC       {ECO:0000305}.
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DR   EMBL; AF106914; AAF15965.1; -; mRNA.
DR   AlphaFoldDB; Q9QYB0; -.
DR   SMR; Q9QYB0; -.
DR   GO; GO:0005615; C:extracellular space; ISS:UniProtKB.
DR   GO; GO:0016914; C:follicle-stimulating hormone complex; ISS:UniProtKB.
DR   GO; GO:0016913; F:follicle-stimulating hormone activity; ISS:UniProtKB.
DR   GO; GO:0007186; P:G protein-coupled receptor signaling pathway; ISS:UniProtKB.
DR   GO; GO:0010469; P:regulation of signaling receptor activity; ISS:UniProtKB.
DR   CDD; cd00069; GHB_like; 1.
DR   Gene3D; 2.10.90.10; -; 1.
DR   InterPro; IPR029034; Cystine-knot_cytokine.
DR   InterPro; IPR006208; Glyco_hormone_CN.
DR   InterPro; IPR001545; Gonadotropin_bsu.
DR   InterPro; IPR018245; Gonadotropin_bsu_CS.
DR   PANTHER; PTHR11515; PTHR11515; 1.
DR   Pfam; PF00007; Cys_knot; 1.
DR   SMART; SM00068; GHB; 1.
DR   SUPFAM; SSF57501; SSF57501; 1.
DR   PROSITE; PS00261; GLYCO_HORMONE_BETA_1; 1.
DR   PROSITE; PS00689; GLYCO_HORMONE_BETA_2; 1.
PE   2: Evidence at transcript level;
KW   Disulfide bond; Glycoprotein; Hormone; Secreted; Signal.
FT   SIGNAL          <1..19
FT                   /evidence="ECO:0000250"
FT   CHAIN           20..>126
FT                   /note="Follitropin subunit beta"
FT                   /id="PRO_0000011714"
FT   CARBOHYD        25
FT                   /note="N-linked (GlcNAc...) asparagine"
FT                   /evidence="ECO:0000250|UniProtKB:P01225"
FT   CARBOHYD        42
FT                   /note="N-linked (GlcNAc...) asparagine"
FT                   /evidence="ECO:0000250|UniProtKB:P01225"
FT   DISULFID        21..69
FT                   /evidence="ECO:0000250|UniProtKB:P01225"
FT   DISULFID        35..84
FT                   /evidence="ECO:0000250|UniProtKB:P01225"
FT   DISULFID        38..122
FT                   /evidence="ECO:0000250|UniProtKB:P01225"
FT   DISULFID        46..100
FT                   /evidence="ECO:0000250|UniProtKB:P01225"
FT   DISULFID        50..102
FT                   /evidence="ECO:0000250|UniProtKB:P01225"
FT   DISULFID        105..112
FT                   /evidence="ECO:0000250|UniProtKB:P01225"
FT   NON_TER         1
FT   NON_TER         126
SQ   SEQUENCE   126 AA;  14358 MW;  0E8ED1042B28A27C CRC64;
     MKLIQLCILF WCWRAICCQG CELTNITIAV EKEECRFCIS INTTWCAGYC YTRDLVYKDP
     ARPNTQKICT FKELVYETIR LPGCAHHSDS FYTYPVATEC HCGKCDSDST DCTVRGLGPS
     YCSFGE
 
 
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