ID   HUTH_GEOTN              Reviewed;         504 AA.
AC   A4IK90;
DT   15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT   01-MAY-2007, sequence version 1.
DT   25-MAY-2022, entry version 79.
DE   RecName: Full=Histidine ammonia-lyase {ECO:0000255|HAMAP-Rule:MF_00229};
DE            Short=Histidase {ECO:0000255|HAMAP-Rule:MF_00229};
DE            EC=4.3.1.3 {ECO:0000255|HAMAP-Rule:MF_00229};
GN   Name=hutH {ECO:0000255|HAMAP-Rule:MF_00229}; OrderedLocusNames=GTNG_0362;
OS   Geobacillus thermodenitrificans (strain NG80-2).
OC   Bacteria; Firmicutes; Bacilli; Bacillales; Bacillaceae; Geobacillus.
OX   NCBI_TaxID=420246;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=NG80-2;
RX   PubMed=17372208; DOI=10.1073/pnas.0609650104;
RA   Feng L., Wang W., Cheng J., Ren Y., Zhao G., Gao C., Tang Y., Liu X.,
RA   Han W., Peng X., Liu R., Wang L.;
RT   "Genome and proteome of long-chain alkane degrading Geobacillus
RT   thermodenitrificans NG80-2 isolated from a deep-subsurface oil reservoir.";
RL   Proc. Natl. Acad. Sci. U.S.A. 104:5602-5607(2007).
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=L-histidine = NH4(+) + trans-urocanate; Xref=Rhea:RHEA:21232,
CC         ChEBI:CHEBI:17771, ChEBI:CHEBI:28938, ChEBI:CHEBI:57595; EC=4.3.1.3;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00229};
CC   -!- PATHWAY: Amino-acid degradation; L-histidine degradation into L-
CC       glutamate; N-formimidoyl-L-glutamate from L-histidine: step 1/3.
CC       {ECO:0000255|HAMAP-Rule:MF_00229}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00229}.
CC   -!- PTM: Contains an active site 4-methylidene-imidazol-5-one (MIO), which
CC       is formed autocatalytically by cyclization and dehydration of residues
CC       Ala-Ser-Gly. {ECO:0000255|HAMAP-Rule:MF_00229}.
CC   -!- SIMILARITY: Belongs to the PAL/histidase family. {ECO:0000255|HAMAP-
CC       Rule:MF_00229}.
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DR   EMBL; CP000557; ABO65744.1; -; Genomic_DNA.
DR   RefSeq; WP_008881230.1; NC_009328.1.
DR   AlphaFoldDB; A4IK90; -.
DR   SMR; A4IK90; -.
DR   STRING; 420246.GTNG_0362; -.
DR   EnsemblBacteria; ABO65744; ABO65744; GTNG_0362.
DR   KEGG; gtn:GTNG_0362; -.
DR   eggNOG; COG2986; Bacteria.
DR   HOGENOM; CLU_014801_4_0_9; -.
DR   OMA; CAPQVAG; -.
DR   OrthoDB; 715502at2; -.
DR   UniPathway; UPA00379; UER00549.
DR   Proteomes; UP000001578; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0004397; F:histidine ammonia-lyase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0019556; P:histidine catabolic process to glutamate and formamide; IEA:UniProtKB-UniPathway.
DR   GO; GO:0019557; P:histidine catabolic process to glutamate and formate; IEA:UniProtKB-UniPathway.
DR   CDD; cd00332; PAL-HAL; 1.
DR   Gene3D; 1.10.275.10; -; 1.
DR   HAMAP; MF_00229; His_ammonia_lyase; 1.
DR   InterPro; IPR001106; Aromatic_Lyase.
DR   InterPro; IPR024083; Fumarase/histidase_N.
DR   InterPro; IPR005921; HutH.
DR   InterPro; IPR008948; L-Aspartase-like.
DR   InterPro; IPR022313; Phe/His_NH3-lyase_AS.
DR   PANTHER; PTHR10362; PTHR10362; 1.
DR   Pfam; PF00221; Lyase_aromatic; 1.
DR   SUPFAM; SSF48557; SSF48557; 1.
DR   TIGRFAMs; TIGR01225; hutH; 1.
DR   PROSITE; PS00488; PAL_HISTIDASE; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Histidine metabolism; Lyase.
FT   CHAIN           1..504
FT                   /note="Histidine ammonia-lyase"
FT                   /id="PRO_1000021557"
FT   MOD_RES         142
FT                   /note="2,3-didehydroalanine (Ser)"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00229"
FT   CROSSLNK        141..143
FT                   /note="5-imidazolinone (Ala-Gly)"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00229"
SQ   SEQUENCE   504 AA;  54432 MW;  D8AC869B41A48ADF CRC64;
     MIVLTGHSLT IAEARRVIYD REPVAAALES MEAVRKSRAA VEQAIASGRT IYGVNTGFGK
     LADVRIDGSD LEQLQINLLR SHACAVGEPF AEEVVRAMLL LRANALLKGY SGIRPVVIER
     LLAFLNSGIH PIVPQQGSLG ASGDLAPLAH LALALVGEGE VMYQGQRMPA IQALSQAGIP
     PLSLKEKEGL ALINGTQAMT AMGVIAYLEA EQLAYDSEWI AALTIEALYG VIDAFDARIH
     EARGFLEQAE VAERLRRYLD GSQLITRQGE RRVQDAYSIR CIPQVHGASL RALRYVKETL
     EIEMNAATDN PLIFADGAVL SGGNFHGQPV AIAMDLLKIA VAELANMSER RIERLVNPQL
     SEGLPPFLSP EPGLQSGAMI MQYVAASLVS ENKTLAHPAS VDSIPSSANQ EDHVSMGTTA
     ARHAYLIVQN VRKVLAIELI CALQAVEERG IDQLAPSTSQ LYHQARRIVP SIVADRVFSR
     DIEAVDAWLK QQAIRDRLAG GASV