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CYB5_CUSRE
ID   CYB5_CUSRE              Reviewed;         135 AA.
AC   P49097;
DT   01-FEB-1996, integrated into UniProtKB/Swiss-Prot.
DT   01-FEB-1996, sequence version 1.
DT   03-AUG-2022, entry version 91.
DE   RecName: Full=Cytochrome b5;
OS   Cuscuta reflexa (Southern Asian dodder).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   asterids; lamiids; Solanales; Convolvulaceae; Cuscuteae; Cuscuta;
OC   Cuscuta subgen. Monogynella.
OX   NCBI_TaxID=4129;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RX   PubMed=7959021; DOI=10.1016/0378-1119(94)90180-5;
RA   Subramaniam K., Mahadevan S.;
RT   "The cDNA sequence of cytochrome b5 associated with cytokinin-induced
RT   haustoria formation in Cuscuta reflexa.";
RL   Gene 149:375-376(1994).
CC   -!- FUNCTION: Membrane bound hemoprotein which function as an electron
CC       carrier for several membrane bound oxygenases.
CC   -!- SUBCELLULAR LOCATION: Endoplasmic reticulum membrane {ECO:0000250};
CC       Single-pass membrane protein {ECO:0000250}; Cytoplasmic side
CC       {ECO:0000250}. Microsome membrane {ECO:0000250}; Single-pass membrane
CC       protein {ECO:0000250}; Cytoplasmic side {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the cytochrome b5 family. {ECO:0000305}.
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DR   EMBL; L22209; AAA62621.1; -; mRNA.
DR   PIR; T09946; T09946.
DR   AlphaFoldDB; P49097; -.
DR   SMR; P49097; -.
DR   GO; GO:0005789; C:endoplasmic reticulum membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0020037; F:heme binding; IEA:InterPro.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   Gene3D; 3.10.120.10; -; 1.
DR   InterPro; IPR001199; Cyt_B5-like_heme/steroid-bd.
DR   InterPro; IPR036400; Cyt_B5-like_heme/steroid_sf.
DR   InterPro; IPR018506; Cyt_B5_heme-BS.
DR   Pfam; PF00173; Cyt-b5; 1.
DR   PRINTS; PR00363; CYTOCHROMEB5.
DR   SMART; SM01117; Cyt-b5; 1.
DR   SUPFAM; SSF55856; SSF55856; 1.
DR   PROSITE; PS00191; CYTOCHROME_B5_1; 1.
DR   PROSITE; PS50255; CYTOCHROME_B5_2; 1.
PE   2: Evidence at transcript level;
KW   Electron transport; Endoplasmic reticulum; Heme; Iron; Membrane;
KW   Metal-binding; Microsome; Transmembrane; Transmembrane helix; Transport.
FT   CHAIN           1..135
FT                   /note="Cytochrome b5"
FT                   /id="PRO_0000166024"
FT   TRANSMEM        106..126
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   DOMAIN          4..80
FT                   /note="Cytochrome b5 heme-binding"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00279"
FT   BINDING         39
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:0000255|PROSITE-ProRule:PRU00279"
FT   BINDING         63
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:0000255|PROSITE-ProRule:PRU00279"
SQ   SEQUENCE   135 AA;  14745 MW;  CFF21C952981F5DA CRC64;
     MGGSKVYSLA EVSEHSQPND CWLVIGGKVY DVTKFLDDHP GGADVLLSST AKDATDDFED
     IGHSSSARAM MDEMCVGDID SSTIPTKTSY TPPKQPLYNQ DKTPQFIIKL LQFLVPLIIL
     GVAVGIRFYK KQSSD
 
 
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