NAGB_SHIBS
ID NAGB_SHIBS Reviewed; 266 AA.
AC Q324M6;
DT 05-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT 06-DEC-2005, sequence version 1.
DT 03-AUG-2022, entry version 85.
DE RecName: Full=Glucosamine-6-phosphate deaminase {ECO:0000255|HAMAP-Rule:MF_01241};
DE EC=3.5.99.6 {ECO:0000255|HAMAP-Rule:MF_01241};
DE AltName: Full=GlcN6P deaminase {ECO:0000255|HAMAP-Rule:MF_01241};
DE Short=GNPDA {ECO:0000255|HAMAP-Rule:MF_01241};
DE AltName: Full=Glucosamine-6-phosphate isomerase {ECO:0000255|HAMAP-Rule:MF_01241};
GN Name=nagB {ECO:0000255|HAMAP-Rule:MF_01241}; OrderedLocusNames=SBO_0540;
OS Shigella boydii serotype 4 (strain Sb227).
OC Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC Enterobacteriaceae; Shigella.
OX NCBI_TaxID=300268;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=Sb227;
RX PubMed=16275786; DOI=10.1093/nar/gki954;
RA Yang F., Yang J., Zhang X., Chen L., Jiang Y., Yan Y., Tang X., Wang J.,
RA Xiong Z., Dong J., Xue Y., Zhu Y., Xu X., Sun L., Chen S., Nie H., Peng J.,
RA Xu J., Wang Y., Yuan Z., Wen Y., Yao Z., Shen Y., Qiang B., Hou Y., Yu J.,
RA Jin Q.;
RT "Genome dynamics and diversity of Shigella species, the etiologic agents of
RT bacillary dysentery.";
RL Nucleic Acids Res. 33:6445-6458(2005).
CC -!- FUNCTION: Catalyzes the reversible isomerization-deamination of
CC glucosamine 6-phosphate (GlcN6P) to form fructose 6-phosphate (Fru6P)
CC and ammonium ion. {ECO:0000255|HAMAP-Rule:MF_01241}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=alpha-D-glucosamine 6-phosphate + H2O = beta-D-fructose 6-
CC phosphate + NH4(+); Xref=Rhea:RHEA:12172, ChEBI:CHEBI:15377,
CC ChEBI:CHEBI:28938, ChEBI:CHEBI:57634, ChEBI:CHEBI:75989; EC=3.5.99.6;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01241};
CC -!- ACTIVITY REGULATION: Allosterically activated by N-acetylglucosamine 6-
CC phosphate (GlcNAc6P). {ECO:0000255|HAMAP-Rule:MF_01241}.
CC -!- PATHWAY: Amino-sugar metabolism; N-acetylneuraminate degradation; D-
CC fructose 6-phosphate from N-acetylneuraminate: step 5/5.
CC {ECO:0000255|HAMAP-Rule:MF_01241}.
CC -!- SUBUNIT: Homohexamer; trimer of disulfide-linked dimers.
CC {ECO:0000255|HAMAP-Rule:MF_01241}.
CC -!- SIMILARITY: Belongs to the glucosamine/galactosamine-6-phosphate
CC isomerase family. NagB subfamily. {ECO:0000255|HAMAP-Rule:MF_01241}.
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DR EMBL; CP000036; ABB65232.1; -; Genomic_DNA.
DR RefSeq; WP_001237072.1; NC_007613.1.
DR AlphaFoldDB; Q324M6; -.
DR SMR; Q324M6; -.
DR EnsemblBacteria; ABB65232; ABB65232; SBO_0540.
DR GeneID; 67416285; -.
DR KEGG; sbo:SBO_0540; -.
DR HOGENOM; CLU_049611_0_1_6; -.
DR OMA; FNEPCSS; -.
DR UniPathway; UPA00629; UER00684.
DR Proteomes; UP000007067; Chromosome.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProt.
DR GO; GO:0004342; F:glucosamine-6-phosphate deaminase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0005975; P:carbohydrate metabolic process; IEA:UniProtKB-KW.
DR GO; GO:0006044; P:N-acetylglucosamine metabolic process; IEA:UniProtKB-UniRule.
DR GO; GO:0019262; P:N-acetylneuraminate catabolic process; IEA:UniProtKB-UniPathway.
DR CDD; cd01399; GlcN6P_deaminase; 1.
DR HAMAP; MF_01241; GlcN6P_deamin; 1.
DR InterPro; IPR006148; Glc/Gal-6P_isomerase.
DR InterPro; IPR004547; Glucosamine6P_isomerase.
DR InterPro; IPR018321; Glucosamine6P_isomerase_CS.
DR InterPro; IPR037171; NagB/RpiA_transferase-like.
DR PANTHER; PTHR11280; PTHR11280; 1.
DR Pfam; PF01182; Glucosamine_iso; 1.
DR SUPFAM; SSF100950; SSF100950; 1.
DR TIGRFAMs; TIGR00502; nagB; 1.
DR PROSITE; PS01161; GLC_GALNAC_ISOMERASE; 1.
PE 3: Inferred from homology;
KW Allosteric enzyme; Carbohydrate metabolism; Disulfide bond; Hydrolase.
FT CHAIN 1..266
FT /note="Glucosamine-6-phosphate deaminase"
FT /id="PRO_1000067018"
FT ACT_SITE 72
FT /note="Proton acceptor; for enolization step"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01241"
FT ACT_SITE 141
FT /note="For ring-opening step"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01241"
FT ACT_SITE 143
FT /note="Proton acceptor; for ring-opening step"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01241"
FT ACT_SITE 148
FT /note="For ring-opening step"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01241"
FT SITE 151
FT /note="Part of the allosteric site"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01241"
FT SITE 158
FT /note="Part of the allosteric site"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01241"
FT SITE 160
FT /note="Part of the allosteric site"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01241"
FT SITE 161
FT /note="Part of the allosteric site"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01241"
FT SITE 254
FT /note="Part of the allosteric site"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01241"
FT DISULFID 219
FT /note="Interchain"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01241"
SQ SEQUENCE 266 AA; 29774 MW; D1443A40E74AC08E CRC64;
MRLIPLTTAE QVGKWAARHI VNRINAFKPT ADRPFVLGLP TGGTPMTTYK ALVEMHKAGQ
VSFKHVVTFN MDEYVGLPKE HPESYYSFMH RNFFDHVDIP AENINLLNGN APDIDAECRQ
YEEKIRSYGK IHLFMGGVGN DGHIAFNEPA SSLASRTRIK TLTHDTRVAN SRFFDNDVNQ
VPKYALTVGV GTLLDAEEVM ILVLGSQKAL ALQAAVEGCV NHMWTISCLQ LHPKAIMVCD
EPSTMELKVK TLRYFNELEA ENIKGL
