ID   HEM2_AQUAE              Reviewed;         330 AA.
AC   O67876;
DT   30-MAY-2000, integrated into UniProtKB/Swiss-Prot.
DT   01-AUG-1998, sequence version 1.
DT   03-AUG-2022, entry version 112.
DE   RecName: Full=Delta-aminolevulinic acid dehydratase;
DE            Short=ALAD;
DE            Short=ALADH;
DE            EC=4.2.1.24;
DE   AltName: Full=Porphobilinogen synthase;
GN   Name=hemB; OrderedLocusNames=aq_2109;
OS   Aquifex aeolicus (strain VF5).
OC   Bacteria; Aquificae; Aquificales; Aquificaceae; Aquifex.
OX   NCBI_TaxID=224324;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=VF5;
RX   PubMed=9537320; DOI=10.1038/32831;
RA   Deckert G., Warren P.V., Gaasterland T., Young W.G., Lenox A.L.,
RA   Graham D.E., Overbeek R., Snead M.A., Keller M., Aujay M., Huber R.,
RA   Feldman R.A., Short J.M., Olsen G.J., Swanson R.V.;
RT   "The complete genome of the hyperthermophilic bacterium Aquifex aeolicus.";
RL   Nature 392:353-358(1998).
CC   -!- FUNCTION: Catalyzes an early step in the biosynthesis of tetrapyrroles.
CC       Binds two molecules of 5-aminolevulinate per subunit, each at a
CC       distinct site, and catalyzes their condensation to form porphobilinogen
CC       (By similarity). {ECO:0000250}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=2 5-aminolevulinate = H(+) + 2 H2O + porphobilinogen;
CC         Xref=Rhea:RHEA:24064, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:58126, ChEBI:CHEBI:356416; EC=4.2.1.24;
CC   -!- COFACTOR:
CC       Name=Zn(2+); Xref=ChEBI:CHEBI:29105; Evidence={ECO:0000250};
CC       Note=Binds 1 zinc ion per monomer. {ECO:0000250};
CC   -!- PATHWAY: Porphyrin-containing compound metabolism; protoporphyrin-IX
CC       biosynthesis; coproporphyrinogen-III from 5-aminolevulinate: step 1/4.
CC   -!- SUBUNIT: Homooctamer. {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the ALAD family. {ECO:0000305}.
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DR   EMBL; AE000657; AAC07837.1; -; Genomic_DNA.
DR   PIR; H70480; H70480.
DR   RefSeq; NP_214445.1; NC_000918.1.
DR   RefSeq; WP_010881381.1; NC_000918.1.
DR   AlphaFoldDB; O67876; -.
DR   SMR; O67876; -.
DR   STRING; 224324.aq_2109; -.
DR   EnsemblBacteria; AAC07837; AAC07837; aq_2109.
DR   KEGG; aae:aq_2109; -.
DR   PATRIC; fig|224324.8.peg.1627; -.
DR   eggNOG; COG0113; Bacteria.
DR   HOGENOM; CLU_035731_0_0_0; -.
DR   InParanoid; O67876; -.
DR   OMA; YQMDYAN; -.
DR   OrthoDB; 677575at2; -.
DR   UniPathway; UPA00251; UER00318.
DR   Proteomes; UP000000798; Chromosome.
DR   GO; GO:0005829; C:cytosol; IBA:GO_Central.
DR   GO; GO:0004655; F:porphobilinogen synthase activity; IBA:GO_Central.
DR   GO; GO:0008270; F:zinc ion binding; IBA:GO_Central.
DR   GO; GO:0006783; P:heme biosynthetic process; IBA:GO_Central.
DR   GO; GO:0006782; P:protoporphyrinogen IX biosynthetic process; IEA:UniProtKB-UniPathway.
DR   Gene3D; 3.20.20.70; -; 1.
DR   InterPro; IPR001731; ALAD.
DR   InterPro; IPR030656; ALAD_AS.
DR   InterPro; IPR013785; Aldolase_TIM.
DR   PANTHER; PTHR11458; PTHR11458; 1.
DR   Pfam; PF00490; ALAD; 1.
DR   PIRSF; PIRSF001415; Porphbilin_synth; 1.
DR   PRINTS; PR00144; DALDHYDRTASE.
DR   SMART; SM01004; ALAD; 1.
DR   PROSITE; PS00169; D_ALA_DEHYDRATASE; 1.
PE   3: Inferred from homology;
KW   Heme biosynthesis; Lyase; Magnesium; Metal-binding; Porphyrin biosynthesis;
KW   Reference proteome; Zinc.
FT   CHAIN           1..330
FT                   /note="Delta-aminolevulinic acid dehydratase"
FT                   /id="PRO_0000140491"
FT   ACT_SITE        198
FT                   /note="Schiff-base intermediate with substrate"
FT                   /evidence="ECO:0000250"
FT   ACT_SITE        251
FT                   /note="Schiff-base intermediate with substrate"
FT                   /evidence="ECO:0000250"
FT   BINDING         123
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000250"
FT   BINDING         125
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000250"
FT   BINDING         133
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000250"
FT   BINDING         208
FT                   /ligand="5-aminolevulinate"
FT                   /ligand_id="ChEBI:CHEBI:356416"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000250"
FT   BINDING         220
FT                   /ligand="5-aminolevulinate"
FT                   /ligand_id="ChEBI:CHEBI:356416"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000250"
FT   BINDING         236
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250"
FT   BINDING         277
FT                   /ligand="5-aminolevulinate"
FT                   /ligand_id="ChEBI:CHEBI:356416"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000250"
FT   BINDING         316
FT                   /ligand="5-aminolevulinate"
FT                   /ligand_id="ChEBI:CHEBI:356416"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   330 AA;  37091 MW;  AC70D2063D9C7457 CRC64;
     MIVGRFPSSR PRRLRRNENI RRLVRETHLT LDDLIYPIFV RWGENVVEEV PSMPGVYRYS
     VDKVVDAVKE VRDLGIPAII LFGIPEHKDE VGSDTWSEEG IIQRALRKIK KEVPDIYVIT
     DVCFCEYTTH GHCGVLHDHD VENDLTLENL KKQVVSHAEN GADMVAPSGM MDGMVKVIRE
     ALDEAGFKHI PIMAYSAKFA SAYYGPFREA AESAPAFGDR RTYQMDPANS REALKEVLMD
     VEEGADVVMV KPALAYLDII AKVKENVLVP VCAYNVSGEY SLIKAAGKLG WIDEKKVMWE
     TLLSIKRAGA DMIITYFAKD AARMIIEGEV