ID A0A2D0SB12_ICTPU Unreviewed; 369 AA.
AC A0A2D0SB12;
DT 20-DEC-2017, integrated into UniProtKB/TrEMBL.
DT 20-DEC-2017, sequence version 1.
DT 27-MAR-2024, entry version 27.
DE RecName: Full=Somatostatin receptor type 2 {ECO:0000256|ARBA:ARBA00018772};
GN Name=sstr2a {ECO:0000313|RefSeq:XP_017339928.1};
OS Ictalurus punctatus (Channel catfish) (Silurus punctatus).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Siluriformes;
OC Ictaluridae; Ictalurus.
OX NCBI_TaxID=7998 {ECO:0000313|RefSeq:XP_017339928.1};
RN [1] {ECO:0000313|RefSeq:XP_017339928.1}
RP IDENTIFICATION.
RC TISSUE=Blood {ECO:0000313|RefSeq:XP_017339928.1};
RG RefSeq;
RL Submitted (NOV-2023) to UniProtKB.
CC -!- FUNCTION: Receptor for somatostatin-14 and -28. This receptor is
CC coupled via pertussis toxin sensitive G proteins to inhibition of
CC adenylyl cyclase. In addition it stimulates phosphotyrosine phosphatase
CC and PLC via pertussis toxin insensitive as well as sensitive G
CC proteins. Inhibits calcium entry by suppressing voltage-dependent
CC calcium channels. Acts as the functionally dominant somatostatin
CC receptor in pancreatic alpha- and beta-cells where it mediates the
CC inhibitory effect of somatostatin-14 on hormone secretion. Inhibits
CC cell growth through enhancement of MAPK1 and MAPK2 phosphorylation and
CC subsequent up-regulation of CDKN1B. Stimulates neuronal migration and
CC axon outgrowth and may participate in neuron development and maturation
CC during brain development. Mediates negative regulation of insulin
CC receptor signaling through PTPN6. Inactivates SSTR3 receptor function
CC following heterodimerization. {ECO:0000256|ARBA:ARBA00024823}.
CC -!- SUBUNIT: Homodimer and heterodimer with SSTR3 and SSTR5.
CC Heterodimerization with SSTR3 inactivates SSTR3 receptor function.
CC Heterodimerization with SSTR5 is enhanced by agonist stimulation of
CC SSTR2 and increases SSTR2 cell growth inhibition activity. Following
CC agonist stimulation, homodimers dissociate into monomers which is
CC required for receptor internalization. Interacts with beta-arrestin;
CC this interaction is necessary for receptor internalization and is
CC destabilized by heterodimerization with SSTR5 which results in
CC increased recycling of SSTR2 to the cell surface. Interacts (via C-
CC terminus) with SHANK1 (via PDZ domain).
CC {ECO:0000256|ARBA:ARBA00025919}.
CC -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000256|ARBA:ARBA00004651};
CC Multi-pass membrane protein {ECO:0000256|ARBA:ARBA00004651}. Cytoplasm
CC {ECO:0000256|ARBA:ARBA00004496}. Membrane
CC {ECO:0000256|ARBA:ARBA00004141}; Multi-pass membrane protein
CC {ECO:0000256|ARBA:ARBA00004141}.
CC -!- SIMILARITY: Belongs to the G-protein coupled receptor 1 family.
CC {ECO:0000256|RuleBase:RU000688}.
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DR RefSeq; XP_017339928.1; XM_017484439.3.
DR AlphaFoldDB; A0A2D0SB12; -.
DR GeneID; 108274330; -.
DR CTD; 100333578; -.
DR OrthoDB; 5393360at2759; -.
DR Proteomes; UP000221080; Chromosome 13.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0004994; F:somatostatin receptor activity; IEA:InterPro.
DR Gene3D; 1.20.1070.10; Rhodopsin 7-helix transmembrane proteins; 1.
DR InterPro; IPR000276; GPCR_Rhodpsn.
DR InterPro; IPR017452; GPCR_Rhodpsn_7TM.
DR InterPro; IPR000586; Somatstn_rcpt.
DR InterPro; IPR002074; Somatstn_rcpt_2.
DR PANTHER; PTHR24229; NEUROPEPTIDES RECEPTOR; 1.
DR PANTHER; PTHR24229:SF6; SOMATOSTATIN RECEPTOR TYPE 2; 1.
DR Pfam; PF00001; 7tm_1; 1.
DR PRINTS; PR00237; GPCRRHODOPSN.
DR PRINTS; PR00246; SOMATOSTATNR.
DR PRINTS; PR00588; SOMATOSTTN2R.
DR SMART; SM01381; 7TM_GPCR_Srsx; 1.
DR SUPFAM; SSF81321; Family A G protein-coupled receptor-like; 1.
DR PROSITE; PS00237; G_PROTEIN_RECEP_F1_1; 1.
DR PROSITE; PS50262; G_PROTEIN_RECEP_F1_2; 1.
PE 3: Inferred from homology;
KW Cell membrane {ECO:0000256|ARBA:ARBA00022475};
KW Disulfide bond {ECO:0000256|ARBA:ARBA00023157};
KW G-protein coupled receptor {ECO:0000256|ARBA:ARBA00023040,
KW ECO:0000256|RuleBase:RU000688};
KW Glycoprotein {ECO:0000256|ARBA:ARBA00023180};
KW Lipoprotein {ECO:0000256|ARBA:ARBA00023288};
KW Membrane {ECO:0000256|ARBA:ARBA00023136, ECO:0000256|SAM:Phobius};
KW Palmitate {ECO:0000256|ARBA:ARBA00023139};
KW Phosphoprotein {ECO:0000256|ARBA:ARBA00022553};
KW Receptor {ECO:0000256|ARBA:ARBA00023170, ECO:0000256|RuleBase:RU000688};
KW Transducer {ECO:0000256|ARBA:ARBA00023224, ECO:0000256|RuleBase:RU000688};
KW Transmembrane {ECO:0000256|ARBA:ARBA00022692,
KW ECO:0000256|RuleBase:RU000688};
KW Transmembrane helix {ECO:0000256|ARBA:ARBA00022989,
KW ECO:0000256|SAM:Phobius}.
FT TRANSMEM 45..66
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 78..101
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 121..140
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 161..180
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 200..230
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 251..271
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 291..312
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT DOMAIN 57..309
FT /note="G-protein coupled receptors family 1 profile"
FT /evidence="ECO:0000259|PROSITE:PS50262"
SQ SEQUENCE 369 AA; 41797 MW; A27357669605BF71 CRC64;
MTEELNNLLR QSFFPVNESD FSPDDYPHNI THHAFDQTSS VVITFVYFVV CAVGLCGNAL
VMYVILRYAK MKTVTNIYIL NLAVADVLCM LSLPFIAIQL ALLHWPFGAA ICRIVLTMDS
LNQFTSIFFL TVMSIDRYLA VVHPIKSTKW RKPRVAKTIS LAMWGVSLLV NLPIMIFSGL
NTNKNEARTC TMLWPEPQNT YYTAFIFYTF LMGFFLPLIV ICLCYLLIVI KVKSSGVRVC
SSKRKRSERK VTRMVSIVVV VFVLCWLPFF MFNVASVTGT LIPTPVLKST FDFVVVLGYA
NSCANPILYA FLSDNFKKSF QNVLCLKRVG GLDEIERSDS RQDRTRMVND IITETHNAAL
LNGDLQTSI
//
