ID   B4VM06_9CYAN            Unreviewed;        93 AA.
AC   B4VM06;
DT   23-SEP-2008, integrated into UniProtKB/TrEMBL.
DT   23-SEP-2008, sequence version 1.
DT   24-JAN-2024, entry version 55.
DE   RecName: Full=4a-hydroxytetrahydrobiopterin dehydratase {ECO:0000256|ARBA:ARBA00013252};
DE            EC=4.2.1.96 {ECO:0000256|ARBA:ARBA00013252};
DE   Flags: Fragment;
GN   ORFNames=MC7420_1883 {ECO:0000313|EMBL:EDX76880.1};
OS   Coleofasciculus chthonoplastes PCC 7420.
OC   Bacteria; Cyanobacteriota; Cyanophyceae; Coleofasciculales;
OC   Coleofasciculaceae; Coleofasciculus.
OX   NCBI_TaxID=118168 {ECO:0000313|EMBL:EDX76880.1, ECO:0000313|Proteomes:UP000003835};
RN   [1] {ECO:0000313|EMBL:EDX76880.1, ECO:0000313|Proteomes:UP000003835}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=PCC 7420 {ECO:0000313|EMBL:EDX76880.1,
RC   ECO:0000313|Proteomes:UP000003835};
RA   Tandeau de Marsac N., Ferriera S., Johnson J., Kravitz S., Beeson K.,
RA   Sutton G., Rogers Y.-H., Friedman R., Frazier M., Venter J.C.;
RL   Submitted (JUL-2008) to the EMBL/GenBank/DDBJ databases.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=(4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin =
CC         (6R)-L-erythro-6,7-dihydrobiopterin + H2O; Xref=Rhea:RHEA:11920,
CC         ChEBI:CHEBI:15377, ChEBI:CHEBI:15642, ChEBI:CHEBI:43120; EC=4.2.1.96;
CC         Evidence={ECO:0000256|ARBA:ARBA00001554};
CC   -!- SIMILARITY: Belongs to the pterin-4-alpha-carbinolamine dehydratase
CC       family. {ECO:0000256|ARBA:ARBA00006472}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; DS989845; EDX76880.1; -; Genomic_DNA.
DR   RefSeq; WP_006099838.1; NZ_DS989845.1.
DR   AlphaFoldDB; B4VM06; -.
DR   STRING; 118168.MC7420_1883; -.
DR   eggNOG; COG2154; Bacteria.
DR   HOGENOM; CLU_2391030_0_0_3; -.
DR   OrthoDB; 9794987at2; -.
DR   Proteomes; UP000003835; Unassembled WGS sequence.
DR   GO; GO:0008124; F:4-alpha-hydroxytetrahydrobiopterin dehydratase activity; IEA:UniProtKB-EC.
DR   GO; GO:0006729; P:tetrahydrobiopterin biosynthetic process; IEA:InterPro.
DR   CDD; cd00488; PCD_DCoH; 1.
DR   Gene3D; 3.30.1360.20; Transcriptional coactivator/pterin dehydratase; 1.
DR   HAMAP; MF_00434; Pterin_4_alpha; 1.
DR   InterPro; IPR036428; PCD_sf.
DR   InterPro; IPR001533; Pterin_deHydtase.
DR   PANTHER; PTHR12599; PTERIN-4-ALPHA-CARBINOLAMINE DEHYDRATASE; 1.
DR   PANTHER; PTHR12599:SF0; PTERIN-4-ALPHA-CARBINOLAMINE DEHYDRATASE; 1.
DR   Pfam; PF01329; Pterin_4a; 1.
DR   SUPFAM; SSF55248; PCD-like; 1.
PE   3: Inferred from homology;
KW   Lyase {ECO:0000256|ARBA:ARBA00023239, ECO:0000313|EMBL:EDX76880.1};
KW   Reference proteome {ECO:0000313|Proteomes:UP000003835}.
FT   NON_TER         1
FT                   /evidence="ECO:0000313|EMBL:EDX76880.1"
SQ   SEQUENCE   93 AA;  10125 MW;  1B2767CDD41311AE CRC64;
     AELLSDAEIQ EKVKSLEGWT VEGKELHTTR QFKDFVEAIA FVNKIVEPAE AAGHHPDLAI
     SYNKVTISLT THDAGGLTAN DFEMAQTLSQ LSA
//