RGN_CHICK
ID RGN_CHICK Reviewed; 299 AA.
AC Q9I923;
DT 15-MAY-2007, integrated into UniProtKB/Swiss-Prot.
DT 01-OCT-2000, sequence version 1.
DT 03-AUG-2022, entry version 81.
DE RecName: Full=Regucalcin;
DE Short=RC;
DE AltName: Full=Gluconolactonase;
DE Short=GNL;
DE EC=3.1.1.17;
GN Name=RGN {ECO:0000250|UniProtKB:Q03336};
OS Gallus gallus (Chicken).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC Archelosauria; Archosauria; Dinosauria; Saurischia; Theropoda;
OC Coelurosauria; Aves; Neognathae; Galloanserae; Galliformes; Phasianidae;
OC Phasianinae; Gallus.
OX NCBI_TaxID=9031;
RN [1] {ECO:0000312|EMBL:BAA90693.1}
RP NUCLEOTIDE SEQUENCE [MRNA].
RC TISSUE=Liver {ECO:0000312|EMBL:BAA90693.1};
RX PubMed=10891565; DOI=10.3892/ijmm.6.2.191;
RA Misawa H., Yamaguchi M.;
RT "The gene of Ca2+-binding protein regucalcin is highly conserved in
RT vertebrate species.";
RL Int. J. Mol. Med. 6:191-196(2000).
CC -!- FUNCTION: Gluconolactonase with low activity towards other sugar
CC lactones, including gulonolactone and galactonolactone. Catalyzes a key
CC step in ascorbic acid (vitamin C) biosynthesis. Can also hydrolyze
CC diisopropyl phosphorofluoridate and phenylacetate (in vitro). Calcium-
CC binding protein. Modulates Ca(2+) signaling, and Ca(2+)-dependent
CC cellular processes and enzyme activities (By similarity).
CC {ECO:0000250}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=D-glucono-1,5-lactone + H2O = D-gluconate + H(+);
CC Xref=Rhea:RHEA:10440, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC ChEBI:CHEBI:16217, ChEBI:CHEBI:18391; EC=3.1.1.17;
CC -!- COFACTOR:
CC Name=Zn(2+); Xref=ChEBI:CHEBI:29105; Evidence={ECO:0000250};
CC Name=Mn(2+); Xref=ChEBI:CHEBI:29035; Evidence={ECO:0000250};
CC Name=Ca(2+); Xref=ChEBI:CHEBI:29108; Evidence={ECO:0000250};
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000250};
CC Note=Binds 1 divalent metal cation per subunit. Most active with Zn(2+)
CC and Mn(2+) ions. The physiological cofactor is most likely Ca(2+) or
CC Mg(2+). {ECO:0000250};
CC -!- PATHWAY: Cofactor biosynthesis; L-ascorbate biosynthesis via UDP-alpha-
CC D-glucuronate pathway; L-ascorbate from UDP-alpha-D-glucuronate: step
CC 3/4.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000250|UniProtKB:Q03336}.
CC -!- SIMILARITY: Belongs to the SMP-30/CGR1 family.
CC {ECO:0000250|UniProtKB:Q03336}.
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DR EMBL; AB037935; BAA90693.1; -; mRNA.
DR RefSeq; NP_990060.1; NM_204729.1.
DR AlphaFoldDB; Q9I923; -.
DR SMR; Q9I923; -.
DR STRING; 9031.ENSGALP00000026937; -.
DR PaxDb; Q9I923; -.
DR PRIDE; Q9I923; -.
DR GeneID; 395480; -.
DR KEGG; gga:395480; -.
DR CTD; 9104; -.
DR VEuPathDB; HostDB:geneid_395480; -.
DR eggNOG; KOG4499; Eukaryota.
DR InParanoid; Q9I923; -.
DR OrthoDB; 1343872at2759; -.
DR PhylomeDB; Q9I923; -.
DR UniPathway; UPA00991; UER00938.
DR PRO; PR:Q9I923; -.
DR Proteomes; UP000000539; Unplaced.
DR GO; GO:0005737; C:cytoplasm; ISS:UniProtKB.
DR GO; GO:0005634; C:nucleus; ISS:UniProtKB.
DR GO; GO:0005509; F:calcium ion binding; ISS:UniProtKB.
DR GO; GO:0030234; F:enzyme regulator activity; IEA:InterPro.
DR GO; GO:0004341; F:gluconolactonase activity; ISS:UniProtKB.
DR GO; GO:0008270; F:zinc ion binding; ISS:UniProtKB.
DR GO; GO:0006874; P:cellular calcium ion homeostasis; ISS:UniProtKB.
DR GO; GO:0019853; P:L-ascorbic acid biosynthetic process; ISS:UniProtKB.
DR GO; GO:0032781; P:positive regulation of ATP-dependent activity; ISS:UniProtKB.
DR GO; GO:0050848; P:regulation of calcium-mediated signaling; ISS:UniProtKB.
DR Gene3D; 2.120.10.30; -; 1.
DR InterPro; IPR011042; 6-blade_b-propeller_TolB-like.
DR InterPro; IPR008367; Regucalcin.
DR InterPro; IPR013658; SGL.
DR InterPro; IPR005511; SMP-30.
DR Pfam; PF08450; SGL; 1.
DR PRINTS; PR01791; REGUCALCIN.
DR PRINTS; PR01790; SMP30FAMILY.
PE 2: Evidence at transcript level;
KW Ascorbate biosynthesis; Calcium; Cytoplasm; Hydrolase; Metal-binding;
KW Reference proteome.
FT CHAIN 1..299
FT /note="Regucalcin"
FT /id="PRO_0000287684"
FT ACT_SITE 204
FT /note="Proton donor/acceptor"
FT /evidence="ECO:0000250"
FT BINDING 18
FT /ligand="a divalent metal cation"
FT /ligand_id="ChEBI:CHEBI:60240"
FT /evidence="ECO:0000250"
FT BINDING 101
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 103
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 121
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 154
FT /ligand="a divalent metal cation"
FT /ligand_id="ChEBI:CHEBI:60240"
FT /evidence="ECO:0000250"
FT BINDING 204
FT /ligand="a divalent metal cation"
FT /ligand_id="ChEBI:CHEBI:60240"
FT /evidence="ECO:0000250"
SQ SEQUENCE 299 AA; 33230 MW; 4754C7571164720E CRC64;
MSSVKIECVG SDRYRLGESP VWDEKENSLL CVDITGRKVC RWDAASGQVQ ALSVDAPVSS
VALRKSGDYV ITLGTRFAAL KWKEQLVTTI AQVDRDKANN RFNDGKVDPA GRYFAGTMAE
EIRPAVLERR QGSLYTLCPD HSVVKHFDQV DISNGLDWSL DHKTFFYIDS LSYSVDAFDY
DLQTGKIGNR RSVYKLEKEE SIPDGMCIDT EGKLWVACYD GGRVIRLDPE TGKRIQTVKL
PVDKTTSCCF GGKDYSEMYV TSASDGMDRE WLSRQPQAGG VFKITGLGVK GIPPYPFAG
