ID   HIS3_BACHK              Reviewed;         101 AA.
AC   Q6HLE2;
DT   04-APR-2006, integrated into UniProtKB/Swiss-Prot.
DT   19-JUL-2004, sequence version 1.
DT   02-SEP-2026, entry version 100.
DE   RecName: Full=Phosphoribosyl-AMP cyclohydrolase {ECO:0000255|HAMAP-Rule:MF_01021};
DE            Short=PRA-CH {ECO:0000255|HAMAP-Rule:MF_01021};
DE            EC=3.5.4.19 {ECO:0000255|HAMAP-Rule:MF_01021};
GN   Name=hisI {ECO:0000255|HAMAP-Rule:MF_01021};
GN   OrderedLocusNames=BT9727_1295;
OS   Bacillus thuringiensis subsp. konkukian (strain 97-27).
OC   Bacteria; Bacillati; Bacillota; Bacilli; Caryophanales; Bacillaceae;
OC   Bacillus; Bacillus cereus group.
OX   NCBI_TaxID=281309;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=97-27;
RX   PubMed=16621833; DOI=10.1128/jb.188.9.3382-3390.2006;
RA   Han C.S., Xie G., Challacombe J.F., Altherr M.R., Bhotika S.S., Bruce D.,
RA   Campbell C.S., Campbell M.L., Chen J., Chertkov O., Cleland C.,
RA   Dimitrijevic M., Doggett N.A., Fawcett J.J., Glavina T., Goodwin L.A.,
RA   Hill K.K., Hitchcock P., Jackson P.J., Keim P., Kewalramani A.R.,
RA   Longmire J., Lucas S., Malfatti S., McMurry K., Meincke L.J., Misra M.,
RA   Moseman B.L., Mundt M., Munk A.C., Okinaka R.T., Parson-Quintana B.,
RA   Reilly L.P., Richardson P., Robinson D.L., Rubin E., Saunders E., Tapia R.,
RA   Tesmer J.G., Thayer N., Thompson L.S., Tice H., Ticknor L.O., Wills P.L.,
RA   Brettin T.S., Gilna P.;
RT   "Pathogenomic sequence analysis of Bacillus cereus and Bacillus
RT   thuringiensis isolates closely related to Bacillus anthracis.";
RL   J. Bacteriol. 188:3382-3390(2006).
CC   -!- FUNCTION: Catalyzes the hydrolysis of the adenine ring of
CC       phosphoribosyl-AMP. {ECO:0000255|HAMAP-Rule:MF_01021}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=1-(5-phospho-beta-D-ribosyl)-5'-AMP + H2O = 1-(5-phospho-beta-
CC         D-ribosyl)-5-[(5-phospho-beta-D-
CC         ribosylamino)methylideneamino]imidazole-4-carboxamide;
CC         Xref=Rhea:RHEA:20049, ChEBI:CHEBI:15377, ChEBI:CHEBI:58435,
CC         ChEBI:CHEBI:59457; EC=3.5.4.19; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01021};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01021};
CC       Note=Binds 1 Mg(2+) ion per subunit. {ECO:0000255|HAMAP-Rule:MF_01021};
CC   -!- COFACTOR:
CC       Name=Zn(2+); Xref=ChEBI:CHEBI:29105; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01021};
CC       Note=Binds 1 zinc ion per subunit. {ECO:0000255|HAMAP-Rule:MF_01021};
CC   -!- PATHWAY: Amino-acid biosynthesis; L-histidine biosynthesis; L-histidine
CC       from 5-phospho-alpha-D-ribose 1-diphosphate: step 3/9.
CC       {ECO:0000255|HAMAP-Rule:MF_01021}.
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_01021}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_01021}.
CC   -!- SIMILARITY: Belongs to the PRA-CH family. {ECO:0000255|HAMAP-
CC       Rule:MF_01021}.
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DR   EMBL; AE017355; AAT59423.1; -; Genomic_DNA.
DR   RefSeq; WP_000803979.1; NC_005957.1.
DR   AlphaFoldDB; Q6HLE2; -.
DR   SMR; Q6HLE2; -.
DR   KEGG; btk:BT9727_1295; -.
DR   PATRIC; fig|281309.8.peg.1364; -.
DR   HOGENOM; CLU_048577_5_3_9; -.
DR   UniPathway; UPA00031; UER00008.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0004635; F:phosphoribosyl-AMP cyclohydrolase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0004636; F:phosphoribosyl-ATP diphosphatase activity; IEA:UniProtKB-ARBA.
DR   GO; GO:0008270; F:zinc ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0000105; P:L-histidine biosynthetic process; IEA:UniProtKB-UniRule.
DR   FunFam; 3.10.20.810:FF:000001; Histidine biosynthesis bifunctional protein HisIE; 1.
DR   Gene3D; 3.10.20.810; Phosphoribosyl-AMP cyclohydrolase; 1.
DR   HAMAP; MF_01021; HisI; 1.
DR   InterPro; IPR026660; PRA-CH.
DR   InterPro; IPR002496; PRib_AMP_CycHydrolase_dom.
DR   InterPro; IPR038019; PRib_AMP_CycHydrolase_sf.
DR   NCBIfam; NF000768; PRK00051.1; 1.
DR   PANTHER; PTHR42945; HISTIDINE BIOSYNTHESIS BIFUNCTIONAL PROTEIN; 1.
DR   PANTHER; PTHR42945:SF1; HISTIDINE BIOSYNTHESIS BIFUNCTIONAL PROTEIN HIS7; 1.
DR   Pfam; PF01502; PRA-CH; 1.
DR   SUPFAM; SSF141734; HisI-like; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis; Cytoplasm; Histidine biosynthesis; Hydrolase;
KW   Magnesium; Metal-binding; Zinc.
FT   CHAIN           1..101
FT                   /note="Phosphoribosyl-AMP cyclohydrolase"
FT                   /id="PRO_0000229810"
FT   BINDING         71
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01021"
FT   BINDING         72
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="ligand shared between dimeric partners"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01021"
FT   BINDING         73
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01021"
FT   BINDING         75
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01021"
FT   BINDING         88
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="ligand shared between dimeric partners"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01021"
FT   BINDING         95
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="ligand shared between dimeric partners"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01021"
SQ   SEQUENCE   101 AA;  11607 MW;  FDA6E19DE50A01F1 CRC64;
     MKPNFSKGLL PAVVIEEGTK EVLMLAYMNE EAYEKTLKTK RTWFYSRSRR SLWNKGETSG
     HVQHVQSLYL DCDQDAIVVV VKQVGPACHT GEKTCFHYKI I
//