TCMO_POPTM
ID TCMO_POPTM Reviewed; 505 AA.
AC O24312;
DT 15-DEC-1998, integrated into UniProtKB/Swiss-Prot.
DT 01-JAN-1998, sequence version 1.
DT 03-AUG-2022, entry version 90.
DE RecName: Full=Trans-cinnamate 4-monooxygenase;
DE EC=1.14.14.91 {ECO:0000250|UniProtKB:Q04468};
DE AltName: Full=Cinnamic acid 4-hydroxylase;
DE Short=C4H;
DE Short=CA4H;
DE AltName: Full=Cytochrome P450 73;
DE AltName: Full=Cytochrome P450C4H;
GN Name=CYP73A13;
OS Populus tremuloides (Quaking aspen).
OC Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC rosids; fabids; Malpighiales; Salicaceae; Saliceae; Populus.
OX NCBI_TaxID=3693;
RN [1]
RP NUCLEOTIDE SEQUENCE [MRNA].
RA Ge L., Chiang V.L.;
RT "A full-length cDNA encoding trans-cinnamate 4-hydroxylase from developing
RT xylem of Populus tremuloides.";
RL (er) Plant Gene Register PGR96-075(1996).
CC -!- FUNCTION: Catalyzes the first oxidative step of the phenylpropanoid
CC pathway in higher plants by transforming trans-cinnamate into p-
CC coumarate (By similarity). The compounds formed by this pathway are
CC essential components for lignification, pollination, and defense
CC against ultraviolet light, predators and pathogens (By similarity).
CC {ECO:0000250|UniProtKB:Q04468}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=(E)-cinnamate + O2 + reduced [NADPH--hemoprotein reductase] =
CC (E)-4-coumarate + H(+) + H2O + oxidized [NADPH--hemoprotein
CC reductase]; Xref=Rhea:RHEA:10608, Rhea:RHEA-COMP:11964, Rhea:RHEA-
CC COMP:11965, ChEBI:CHEBI:12876, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC ChEBI:CHEBI:15379, ChEBI:CHEBI:15669, ChEBI:CHEBI:57618,
CC ChEBI:CHEBI:58210; EC=1.14.14.91;
CC Evidence={ECO:0000250|UniProtKB:Q04468};
CC -!- COFACTOR:
CC Name=heme; Xref=ChEBI:CHEBI:30413;
CC Evidence={ECO:0000250|UniProtKB:Q94IP1};
CC -!- PATHWAY: Phenylpropanoid metabolism; trans-4-coumarate biosynthesis;
CC trans-4-coumarate from trans-cinnamate: step 1/1. {ECO:0000305}.
CC -!- SUBCELLULAR LOCATION: Membrane {ECO:0000255}; Single-pass membrane
CC protein {ECO:0000255}.
CC -!- SIMILARITY: Belongs to the cytochrome P450 family. {ECO:0000305}.
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DR EMBL; U47293; AAB67874.1; -; mRNA.
DR AlphaFoldDB; O24312; -.
DR SMR; O24312; -.
DR PRIDE; O24312; -.
DR UniPathway; UPA00825; UER00789.
DR GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR GO; GO:0020037; F:heme binding; IEA:InterPro.
DR GO; GO:0005506; F:iron ion binding; IEA:InterPro.
DR GO; GO:0016710; F:trans-cinnamate 4-monooxygenase activity; IEA:UniProtKB-EC.
DR Gene3D; 1.10.630.10; -; 1.
DR InterPro; IPR001128; Cyt_P450.
DR InterPro; IPR017972; Cyt_P450_CS.
DR InterPro; IPR002401; Cyt_P450_E_grp-I.
DR InterPro; IPR036396; Cyt_P450_sf.
DR Pfam; PF00067; p450; 1.
DR PRINTS; PR00463; EP450I.
DR PRINTS; PR00385; P450.
DR SUPFAM; SSF48264; SSF48264; 1.
DR PROSITE; PS00086; CYTOCHROME_P450; 1.
PE 2: Evidence at transcript level;
KW Heme; Iron; Membrane; Metal-binding; Monooxygenase; Oxidoreductase;
KW Transmembrane; Transmembrane helix.
FT CHAIN 1..505
FT /note="Trans-cinnamate 4-monooxygenase"
FT /id="PRO_0000052252"
FT TRANSMEM 3..23
FT /note="Helical"
FT /evidence="ECO:0000255"
FT BINDING 213..218
FT /ligand="(E)-cinnamate"
FT /ligand_id="ChEBI:CHEBI:15669"
FT /evidence="ECO:0000250|UniProtKB:Q94IP1"
FT BINDING 306
FT /ligand="(E)-cinnamate"
FT /ligand_id="ChEBI:CHEBI:15669"
FT /evidence="ECO:0000250|UniProtKB:Q94IP1"
FT BINDING 447
FT /ligand="heme"
FT /ligand_id="ChEBI:CHEBI:30413"
FT /ligand_part="Fe"
FT /ligand_part_id="ChEBI:CHEBI:18248"
FT /note="axial binding residue"
FT /evidence="ECO:0000250|UniProtKB:Q94IP1"
SQ SEQUENCE 505 AA; 58020 MW; 5BC05C4BCD1474CE CRC64;
MDLLLLEKTL LGSFVAILVA ILVSKLRGKR FKLPPGPLPV PVFGNWLQVG DDLNHRNLTD
LAKKFGDILL LRMGQRNLVV VSSPELSKEV LHTQGVEFGS RTRNVVFDIF TGKGQDMVFT
VYGEHWRKMR RIMTVPFFTN KVVQQYRYGW EEEAAQVVED VKKNPGAATH GIVLRRRLQL
MMYNNMYRIM FDRRFESEED PLFNKLKALN GERSRLAQSF DYNYGDFIPI LRPFLRGYLK
ICQEVKERRL QLFKDYFVDE RKKLASTKNM CNEGLKCAID HILDAQKKGE INEDNVLYIV
ENINVAAIET TLWSIEWGIA ELVNHPEIQK KLRHELDTLL GPGHQITEPD TYKLPYLNAV
VKETLRLRMA IPLLVPHMNL HDAKLGGFDI PAESKILVNA WWLANNPAHW KNPEEFRPER
FLEEEAKVEA NGNDFRYLPF GVGRRSCPGI ILALPILGIT LGRLVQNFEL LPPPGQSKID
TSEKGGQFSL HILKHSTIVA KPRSF