ID   GMHA_BUCAP              Reviewed;         194 AA.
AC   Q8K9R9;
DT   08-NOV-2002, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2002, sequence version 1.
DT   27-MAR-2024, entry version 113.
DE   RecName: Full=Phosphoheptose isomerase {ECO:0000255|HAMAP-Rule:MF_00067};
DE            EC=5.3.1.28 {ECO:0000255|HAMAP-Rule:MF_00067};
DE   AltName: Full=Sedoheptulose 7-phosphate isomerase {ECO:0000255|HAMAP-Rule:MF_00067};
GN   Name=gmhA {ECO:0000255|HAMAP-Rule:MF_00067}; Synonyms=lpcA;
GN   OrderedLocusNames=BUsg_241;
OS   Buchnera aphidicola subsp. Schizaphis graminum (strain Sg).
OC   Bacteria; Pseudomonadota; Gammaproteobacteria; Enterobacterales;
OC   Erwiniaceae; Buchnera.
OX   NCBI_TaxID=198804;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Sg;
RX   PubMed=12089438; DOI=10.1126/science.1071278;
RA   Tamas I., Klasson L., Canbaeck B., Naeslund A.K., Eriksson A.-S.,
RA   Wernegreen J.J., Sandstroem J.P., Moran N.A., Andersson S.G.E.;
RT   "50 million years of genomic stasis in endosymbiotic bacteria.";
RL   Science 296:2376-2379(2002).
CC   -!- FUNCTION: Catalyzes the isomerization of sedoheptulose 7-phosphate in
CC       D-glycero-D-manno-heptose 7-phosphate. {ECO:0000255|HAMAP-
CC       Rule:MF_00067}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=2 D-sedoheptulose 7-phosphate = D-glycero-alpha-D-manno-
CC         heptose 7-phosphate + D-glycero-beta-D-manno-heptose 7-phosphate;
CC         Xref=Rhea:RHEA:27489, ChEBI:CHEBI:57483, ChEBI:CHEBI:60203,
CC         ChEBI:CHEBI:60204; EC=5.3.1.28; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00067};
CC   -!- COFACTOR:
CC       Name=Zn(2+); Xref=ChEBI:CHEBI:29105; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00067};
CC       Note=Binds 1 zinc ion per subunit. {ECO:0000255|HAMAP-Rule:MF_00067};
CC   -!- PATHWAY: Carbohydrate biosynthesis; D-glycero-D-manno-heptose 7-
CC       phosphate biosynthesis; D-glycero-alpha-D-manno-heptose 7-phosphate and
CC       D-glycero-beta-D-manno-heptose 7-phosphate from sedoheptulose 7-
CC       phosphate: step 1/1. {ECO:0000255|HAMAP-Rule:MF_00067}.
CC   -!- SUBUNIT: Homotetramer. {ECO:0000255|HAMAP-Rule:MF_00067}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00067}.
CC   -!- MISCELLANEOUS: The reaction produces a racemic mixture of D-glycero-
CC       alpha-D-manno-heptose 7-phosphate and D-glycero-beta-D-manno-heptose 7-
CC       phosphate. {ECO:0000255|HAMAP-Rule:MF_00067}.
CC   -!- SIMILARITY: Belongs to the SIS family. GmhA subfamily.
CC       {ECO:0000255|HAMAP-Rule:MF_00067}.
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DR   EMBL; AE013218; AAM67800.1; -; Genomic_DNA.
DR   RefSeq; WP_011053767.1; NC_004061.1.
DR   AlphaFoldDB; Q8K9R9; -.
DR   SMR; Q8K9R9; -.
DR   STRING; 198804.BUsg_241; -.
DR   GeneID; 75258880; -.
DR   KEGG; bas:BUsg_241; -.
DR   eggNOG; COG0279; Bacteria.
DR   HOGENOM; CLU_080999_4_0_6; -.
DR   UniPathway; UPA00041; UER00436.
DR   Proteomes; UP000000416; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0097367; F:carbohydrate derivative binding; IEA:InterPro.
DR   GO; GO:0008968; F:D-sedoheptulose 7-phosphate isomerase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0008270; F:zinc ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0005975; P:carbohydrate metabolic process; IEA:UniProtKB-UniRule.
DR   GO; GO:2001061; P:D-glycero-D-manno-heptose 7-phosphate biosynthetic process; IEA:UniProtKB-UniPathway.
DR   CDD; cd05006; SIS_GmhA; 1.
DR   HAMAP; MF_00067; GmhA; 1.
DR   InterPro; IPR035461; GmhA/DiaA.
DR   InterPro; IPR004515; Phosphoheptose_Isoase.
DR   InterPro; IPR001347; SIS_dom.
DR   InterPro; IPR046348; SIS_dom_sf.
DR   NCBIfam; TIGR00441; gmhA; 1.
DR   PANTHER; PTHR30390:SF7; PHOSPHOHEPTOSE ISOMERASE; 1.
DR   PANTHER; PTHR30390; SEDOHEPTULOSE 7-PHOSPHATE ISOMERASE / DNAA INITIATOR-ASSOCIATING FACTOR FOR REPLICATION INITIATION; 1.
DR   Pfam; PF13580; SIS_2; 1.
DR   SUPFAM; SSF53697; SIS domain; 1.
DR   PROSITE; PS51464; SIS; 1.
PE   3: Inferred from homology;
KW   Carbohydrate metabolism; Cytoplasm; Isomerase; Metal-binding; Zinc.
FT   CHAIN           1..194
FT                   /note="Phosphoheptose isomerase"
FT                   /id="PRO_0000136519"
FT   DOMAIN          37..194
FT                   /note="SIS"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00067"
FT   BINDING         52..54
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00067"
FT   BINDING         61
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00067"
FT   BINDING         65
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00067"
FT   BINDING         65
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00067"
FT   BINDING         93..94
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00067"
FT   BINDING         119..121
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00067"
FT   BINDING         124
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00067"
FT   BINDING         172
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00067"
FT   BINDING         172
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00067"
FT   BINDING         180
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00067"
SQ   SEQUENCE   194 AA;  21631 MW;  803DA6B727B36B30 CRC64;
     MYKKIISSEL DAALKILKNF LKNEEQIENI EKAAILIAKS FKNKNKVISC GNGGSHCDAV
     HFSEELTGLY REKRPGYAAI PISDVGHISA IGNDFGYDQI FSRYIESIGL PNDVLLAIST
     SGNSINIINA IQTAHRKKMK VIVLTGNDGG QVKHLSDVEI CIPYHGYSDR IQEMHIKIIH
     ILILIIEKEM KKIN
//