ID   D1A720_THECD            Unreviewed;       128 AA.
AC   D1A720;
DT   19-JAN-2010, integrated into UniProtKB/TrEMBL.
DT   19-JAN-2010, sequence version 1.
DT   28-JAN-2026, entry version 83.
DE   RecName: Full=Phosphoribosyl-AMP cyclohydrolase {ECO:0000256|HAMAP-Rule:MF_01021};
DE            Short=PRA-CH {ECO:0000256|HAMAP-Rule:MF_01021};
DE            EC=3.5.4.19 {ECO:0000256|HAMAP-Rule:MF_01021};
GN   Name=hisI {ECO:0000256|HAMAP-Rule:MF_01021};
GN   OrderedLocusNames=Tcur_2879 {ECO:0000313|EMBL:ACY98424.1};
OS   Thermomonospora curvata (strain ATCC 19995 / DSM 43183 / JCM 3096 /
OS   KCTC 9072 / NBRC 15933 / NCIMB 10081 / Henssen B9).
OC   Bacteria; Bacillati; Actinomycetota; Actinomycetes; Streptosporangiales;
OC   Thermomonosporaceae; Thermomonospora.
OX   NCBI_TaxID=471852 {ECO:0000313|EMBL:ACY98424.1, ECO:0000313|Proteomes:UP000001918};
RN   [1] {ECO:0000313|EMBL:ACY98424.1, ECO:0000313|Proteomes:UP000001918}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 19995 / DSM 43183 / JCM 3096 / KCTC 9072 / NBRC 15933 /
RC   NCIMB 10081 / Henssen B9 {ECO:0000313|Proteomes:UP000001918};
RX   PubMed=21475583; DOI=10.4056/sigs.1453580;
RA   Chertkov O., Sikorski J., Nolan M., Lapidus A., Lucas S., Del Rio T.G.,
RA   Tice H., Cheng J.F., Goodwin L., Pitluck S., Liolios K., Ivanova N.,
RA   Mavromatis K., Mikhailova N., Ovchinnikova G., Pati A., Chen A.,
RA   Palaniappan K., Djao O.D., Land M., Hauser L., Chang Y.J., Jeffries C.D.,
RA   Brettin T., Han C., Detter J.C., Rohde M., Goker M., Woyke T., Bristow J.,
RA   Eisen J.A., Markowitz V., Hugenholtz P., Klenk H.P., Kyrpides N.C.;
RT   "Complete genome sequence of Thermomonospora curvata type strain (B9).";
RL   Stand. Genomic Sci. 1:13-22(2011).
CC   -!- FUNCTION: Catalyzes the hydrolysis of the adenine ring of
CC       phosphoribosyl-AMP. {ECO:0000256|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;
CC         Evidence={ECO:0000256|ARBA:ARBA00000024, ECO:0000256|HAMAP-
CC         Rule:MF_01021};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=1-(5-phospho-beta-D-ribosyl)-ATP + H2O = 1-(5-phospho-beta-D-
CC         ribosyl)-5'-AMP + diphosphate + H(+); Xref=Rhea:RHEA:22828,
CC         ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:33019,
CC         ChEBI:CHEBI:59457, ChEBI:CHEBI:73183; EC=3.6.1.31;
CC         Evidence={ECO:0000256|ARBA:ARBA00001460};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000256|HAMAP-
CC         Rule:MF_01021};
CC       Note=Binds 1 Mg(2+) ion per subunit. {ECO:0000256|HAMAP-Rule:MF_01021};
CC   -!- COFACTOR:
CC       Name=Zn(2+); Xref=ChEBI:CHEBI:29105; Evidence={ECO:0000256|HAMAP-
CC         Rule:MF_01021};
CC       Note=Binds 1 zinc ion per subunit. {ECO:0000256|HAMAP-Rule:MF_01021};
CC   -!- PATHWAY: Amino-acid biosynthesis; L-histidine biosynthesis; L-histidine
CC       from 5-phospho-alpha-D-ribose 1-diphosphate: step 2/9.
CC       {ECO:0000256|ARBA:ARBA00005204}.
CC   -!- PATHWAY: Amino-acid biosynthesis; L-histidine biosynthesis; L-histidine
CC       from 5-phospho-alpha-D-ribose 1-diphosphate: step 3/9.
CC       {ECO:0000256|ARBA:ARBA00005169, ECO:0000256|HAMAP-Rule:MF_01021}.
CC   -!- SUBUNIT: Homodimer. {ECO:0000256|HAMAP-Rule:MF_01021}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|HAMAP-Rule:MF_01021}.
CC   -!- SIMILARITY: Belongs to the PRA-CH family. {ECO:0000256|HAMAP-
CC       Rule:MF_01021}.
CC   -!- SIMILARITY: In the C-terminal section; belongs to the PRA-PH family.
CC       {ECO:0000256|ARBA:ARBA00007731}.
CC   -!- SIMILARITY: In the N-terminal section; belongs to the PRA-CH family.
CC       {ECO:0000256|ARBA:ARBA00008299}.
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DR   EMBL; CP001738; ACY98424.1; -; Genomic_DNA.
DR   AlphaFoldDB; D1A720; -.
DR   STRING; 471852.Tcur_2879; -.
DR   KEGG; tcu:Tcur_2879; -.
DR   eggNOG; COG0139; Bacteria.
DR   HOGENOM; CLU_048577_5_1_11; -.
DR   UniPathway; UPA00031; UER00008.
DR   Proteomes; UP000001918; Chromosome.
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-EC.
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:SF11; PHOSPHORIBOSYL-AMP CYCLOHYDROLASE; 1.
DR   Pfam; PF01502; PRA-CH; 1.
DR   SUPFAM; SSF141734; HisI-like; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis {ECO:0000256|ARBA:ARBA00022605, ECO:0000256|HAMAP-
KW   Rule:MF_01021};
KW   Cytoplasm {ECO:0000256|ARBA:ARBA00022490, ECO:0000256|HAMAP-Rule:MF_01021};
KW   Histidine biosynthesis {ECO:0000256|ARBA:ARBA00023102, ECO:0000256|HAMAP-
KW   Rule:MF_01021};
KW   Hydrolase {ECO:0000256|ARBA:ARBA00022801, ECO:0000256|HAMAP-Rule:MF_01021};
KW   Magnesium {ECO:0000256|ARBA:ARBA00022842, ECO:0000256|HAMAP-Rule:MF_01021};
KW   Metal-binding {ECO:0000256|ARBA:ARBA00022723, ECO:0000256|HAMAP-
KW   Rule:MF_01021}; Reference proteome {ECO:0000313|Proteomes:UP000001918};
KW   Zinc {ECO:0000256|ARBA:ARBA00022833, ECO:0000256|HAMAP-Rule:MF_01021}.
FT   DOMAIN          41..113
FT                   /note="Phosphoribosyl-AMP cyclohydrolase"
FT                   /evidence="ECO:0000259|Pfam:PF01502"
FT   BINDING         88
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01021"
FT   BINDING         89
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="ligand shared between dimeric partners"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01021"
FT   BINDING         90
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01021"
FT   BINDING         92
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01021"
FT   BINDING         105
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="ligand shared between dimeric partners"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01021"
FT   BINDING         112
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="ligand shared between dimeric partners"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01021"
SQ   SEQUENCE   128 AA;  14288 MW;  C366C436097F1F84 CRC64;
     MEDMSERPSG LDPKIAARLK RDPNGLVPAI AQQYDTGEVL MLAWMDDEAL HRTLTTGRAT
     YWSRSRQEYW VKGETSGHQQ WVKSVALDCD GDAILLKVDQ VGPACHTGDR TCWDSDVLEA
     VVGERPES
//