ID   RPIA_PROMP              Reviewed;         231 AA.
AC   Q7V003;
DT   16-JAN-2004, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2003, sequence version 1.
DT   03-AUG-2022, entry version 94.
DE   RecName: Full=Ribose-5-phosphate isomerase A {ECO:0000255|HAMAP-Rule:MF_00170};
DE            EC=5.3.1.6 {ECO:0000255|HAMAP-Rule:MF_00170};
DE   AltName: Full=Phosphoriboisomerase A {ECO:0000255|HAMAP-Rule:MF_00170};
DE            Short=PRI {ECO:0000255|HAMAP-Rule:MF_00170};
GN   Name=rpiA {ECO:0000255|HAMAP-Rule:MF_00170}; OrderedLocusNames=PMM1489;
OS   Prochlorococcus marinus subsp. pastoris (strain CCMP1986 / NIES-2087 /
OS   MED4).
OC   Bacteria; Cyanobacteria; Synechococcales; Prochlorococcaceae;
OC   Prochlorococcus.
OX   NCBI_TaxID=59919;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=CCMP1986 / NIES-2087 / MED4;
RX   PubMed=12917642; DOI=10.1038/nature01947;
RA   Rocap G., Larimer F.W., Lamerdin J.E., Malfatti S., Chain P., Ahlgren N.A.,
RA   Arellano A., Coleman M., Hauser L., Hess W.R., Johnson Z.I., Land M.L.,
RA   Lindell D., Post A.F., Regala W., Shah M., Shaw S.L., Steglich C.,
RA   Sullivan M.B., Ting C.S., Tolonen A., Webb E.A., Zinser E.R.,
RA   Chisholm S.W.;
RT   "Genome divergence in two Prochlorococcus ecotypes reflects oceanic niche
RT   differentiation.";
RL   Nature 424:1042-1047(2003).
CC   -!- FUNCTION: Catalyzes the reversible conversion of ribose-5-phosphate to
CC       ribulose 5-phosphate. {ECO:0000255|HAMAP-Rule:MF_00170}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=aldehydo-D-ribose 5-phosphate = D-ribulose 5-phosphate;
CC         Xref=Rhea:RHEA:14657, ChEBI:CHEBI:58121, ChEBI:CHEBI:58273;
CC         EC=5.3.1.6; Evidence={ECO:0000255|HAMAP-Rule:MF_00170};
CC   -!- PATHWAY: Carbohydrate degradation; pentose phosphate pathway; D-ribose
CC       5-phosphate from D-ribulose 5-phosphate (non-oxidative stage): step
CC       1/1. {ECO:0000255|HAMAP-Rule:MF_00170}.
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_00170}.
CC   -!- SIMILARITY: Belongs to the ribose 5-phosphate isomerase family.
CC       {ECO:0000255|HAMAP-Rule:MF_00170}.
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DR   EMBL; BX548174; CAE19948.1; -; Genomic_DNA.
DR   RefSeq; WP_011133117.1; NC_005072.1.
DR   AlphaFoldDB; Q7V003; -.
DR   SMR; Q7V003; -.
DR   STRING; 59919.PMM1489; -.
DR   EnsemblBacteria; CAE19948; CAE19948; PMM1489.
DR   KEGG; pmm:PMM1489; -.
DR   eggNOG; COG0120; Bacteria.
DR   HOGENOM; CLU_056590_1_1_3; -.
DR   OMA; YDWDEVN; -.
DR   OrthoDB; 1681738at2; -.
DR   UniPathway; UPA00115; UER00412.
DR   Proteomes; UP000001026; Chromosome.
DR   GO; GO:0004751; F:ribose-5-phosphate isomerase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0009052; P:pentose-phosphate shunt, non-oxidative branch; IEA:UniProtKB-UniRule.
DR   CDD; cd01398; RPI_A; 1.
DR   HAMAP; MF_00170; Rib_5P_isom_A; 1.
DR   InterPro; IPR037171; NagB/RpiA_transferase-like.
DR   InterPro; IPR020672; Ribose5P_isomerase_typA_subgr.
DR   InterPro; IPR004788; Ribose5P_isomerase_type_A.
DR   PANTHER; PTHR11934; PTHR11934; 1.
DR   Pfam; PF06026; Rib_5-P_isom_A; 1.
DR   SUPFAM; SSF100950; SSF100950; 1.
DR   TIGRFAMs; TIGR00021; rpiA; 1.
PE   3: Inferred from homology;
KW   Isomerase.
FT   CHAIN           1..231
FT                   /note="Ribose-5-phosphate isomerase A"
FT                   /id="PRO_0000158449"
FT   ACT_SITE        102
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00170"
FT   BINDING         23..26
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00170"
FT   BINDING         80..83
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00170"
FT   BINDING         93..96
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00170"
FT   BINDING         120
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00170"
SQ   SEQUENCE   231 AA;  24881 MW;  076FDCC2F1996CC3 CRC64;
     MKQIVADSAI EEVEDGMILG LGSGSTAALM IKSLAEKIRS GKLKNIKGVP TSFQSEVLAL
     ELNIPLIDLA SVPYIDLAID GADEVDPDFQ LIKGGGACHV REKLVASKAN KLLIVIDESK
     LVQNLNQVFP LPVEVMPSAW KQVKDIISEM SGVSNLRMAT KKAGPVVTDQ GNLILDVLFD
     AGIRDPKDLE MRINNIPGVL ENGLFVDLAD KVLVGKIEDD VPVLFSPSRR S