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Entry version 97 (12 Aug 2020)
Sequence version 1 (06 Dec 2005)
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Protein

Cytochrome b5 reductase 4

Gene

CYB5R4

Organism
Bos taurus (Bovine)
Status
Reviewed-Annotation score:

Annotation score:4 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
-Experimental evidence at transcript leveli <p>This indicates the type of evidence that supports the existence of the protein. Note that the 'protein existence' evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

NADH-cytochrome b5 reductase involved in endoplasmic reticulum stress response pathway. Plays a critical role in protecting pancreatic beta-cells against oxidant stress, possibly by protecting the cell from excess buildup of reactive oxygen species (ROS) (By similarity).By similarity

<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes the catalytic activity of an enzyme, i.e. a chemical reaction that the enzyme catalyzes.<p><a href='/help/catalytic_activity' target='_top'>More...</a></p>Catalytic activityi

<p>This subsection of the 'Function' section provides information relevant to cofactors. A cofactor is any non-protein substance required for a protein to be catalytically active. Some cofactors are inorganic, such as the metal atoms zinc, iron, and copper in various oxidation states. Others, such as most vitamins, are organic.<p><a href='/help/cofactor' target='_top'>More...</a></p>Cofactori

FADBy similarity

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section indicates at which position the protein binds a given metal ion. The nature of the metal is indicated in the 'Description' field.<p><a href='/help/metal' target='_top'>More...</a></p>Metal bindingi89Iron (heme axial ligand)PROSITE-ProRule annotation1
Metal bindingi112Iron (heme axial ligand)PROSITE-ProRule annotation1

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes a region in the protein which binds nucleotide phosphates. It always involves more than one amino acid and includes all residues involved in nucleotide-binding.<p><a href='/help/np_bind' target='_top'>More...</a></p>Nucleotide bindingi364 – 379FADBy similarityAdd BLAST16
Nucleotide bindingi391 – 423FADBy similarityAdd BLAST33

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

GO - Biological processi

<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

Molecular functionOxidoreductase
LigandFAD, Flavoprotein, Heme, Iron, Metal-binding, NAD

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Cytochrome b5 reductase 4 (EC:1.6.2.2)
Alternative name(s):
Flavohemoprotein b5/b5R
Short name:
b5+b5R
cb5/cb5R
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: 'Name', 'Synonyms', 'Ordered locus names' and 'ORF names'.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:CYB5R4
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiBos taurus (Bovine)
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the 'taxonomic identifier' or 'taxid'.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri9913 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaLaurasiatheriaArtiodactylaRuminantiaPecoraBovidaeBovinaeBos
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section is present for entries that are part of a <a href="http://www.uniprot.org/proteomes">proteome</a>, i.e. of a set of proteins thought to be expressed by organisms whose genomes have been completely sequenced.<p><a href='/help/proteomes_manual' target='_top'>More...</a></p>Proteomesi
  • UP000009136 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes%5Fmanual">proteome</a> can consist of several components.<br></br>The component name refers to the genomic component encoding a set of proteins.<p><a href='/help/proteome_component' target='_top'>More...</a></p> Componenti: Chromosome 9

Organism-specific databases

Vertebrate Gene Nomenclature Database

More...
VGNCi
VGNC:50264, CYB5R4

<p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionGraphics by Christian Stolte & Seán O’Donoghue; Source: COMPARTMENTS

Keywords - Cellular componenti

Endoplasmic reticulum

<p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'PTM / Processing' section describes the extent of a polypeptide chain in the mature protein following processing or proteolytic cleavage.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00002875551 – 520Cytochrome b5 reductase 4Add BLAST520

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'PTM / Processing' section specifies the position and type of each modified residue excluding <a href="http://www.uniprot.org/manual/lipid">lipids</a>, <a href="http://www.uniprot.org/manual/carbohyd">glycans</a> and <a href="http://www.uniprot.org/manual/crosslnk">protein cross-links</a>.<p><a href='/help/mod_res' target='_top'>More...</a></p>Modified residuei1N-acetylmethionineBy similarity1

Keywords - PTMi

Acetylation

Proteomic databases

PaxDb, a database of protein abundance averages across all three domains of life

More...
PaxDbi
Q32LH7

PRoteomics IDEntifications database

More...
PRIDEi
Q32LH7

<p>This section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms.<p><a href='/help/expression_section' target='_top'>More...</a></p>Expressioni

Gene expression databases

ExpressionAtlas, Differential and Baseline Expression

More...
ExpressionAtlasi
Q32LH7, baseline and differential

<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

Protein-protein interaction databases

STRING: functional protein association networks

More...
STRINGi
9913.ENSBTAP00000051953

<p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei

3D structure databases

SWISS-MODEL Repository - a database of annotated 3D protein structure models

More...
SMRi
Q32LH7

Database of comparative protein structure models

More...
ModBasei
Search...

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/family%5Fand%5Fdomains%5Fsection">Family and Domains</a> section describes the position and type of a domain, which is defined as a specific combination of secondary structures organized into a characteristic three-dimensional structure or fold.<p><a href='/help/domain' target='_top'>More...</a></p>Domaini54 – 130Cytochrome b5 heme-bindingPROSITE-ProRule annotationAdd BLAST77
Domaini164 – 255CSPROSITE-ProRule annotationAdd BLAST92
Domaini272 – 384FAD-binding FR-typePROSITE-ProRule annotationAdd BLAST113

<p>This subsection of the 'Family and domains' section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
KOG0534, Eukaryota
KOG0536, Eukaryota

Ensembl GeneTree

More...
GeneTreei
ENSGT00940000155536

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
Q32LH7

KEGG Orthology (KO)

More...
KOi
K00326

Database of Orthologous Groups

More...
OrthoDBi
1311668at2759

Family and domain databases

Conserved Domains Database

More...
CDDi
cd06490, p23_NCB5OR, 1 hit

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
2.60.40.790, 1 hit
3.10.120.10, 1 hit
3.40.50.80, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR001834, CBR-like
IPR008333, Cbr1-like_FAD-bd_dom
IPR007052, CS_dom
IPR001199, Cyt_B5-like_heme/steroid-bd
IPR036400, Cyt_B5-like_heme/steroid_sf
IPR018506, Cyt_B5_heme-BS
IPR017927, FAD-bd_FR_type
IPR039261, FNR_nucleotide-bd
IPR008978, HSP20-like_chaperone
IPR001433, OxRdtase_FAD/NAD-bd
IPR037908, p23_NCB5OR
IPR017938, Riboflavin_synthase-like_b-brl

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF04969, CS, 1 hit
PF00173, Cyt-b5, 1 hit
PF00970, FAD_binding_6, 1 hit
PF00175, NAD_binding_1, 1 hit

Protein Motif fingerprint database; a protein domain database

More...
PRINTSi
PR00406, CYTB5RDTASE
PR00363, CYTOCHROMEB5

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM01117, Cyt-b5, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF49764, SSF49764, 1 hit
SSF52343, SSF52343, 1 hit
SSF55856, SSF55856, 1 hit
SSF63380, SSF63380, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS51203, CS, 1 hit
PS00191, CYTOCHROME_B5_1, 1 hit
PS50255, CYTOCHROME_B5_2, 1 hit
PS51384, FAD_FR, 1 hit

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence%5Flength">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequence (1+)i

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences%5Fsection">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

This entry has 1 described isoform and 2 potential isoforms that are computationally mapped.Show allAlign All

Q32LH7-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MLNVPSQSFP GPSSQQRVAS GGRSKVPLKQ GRSLMDWIRL TKSGKDLTGL
60 70 80 90 100
KGRLIEVTEE ELKKHNKKDD CWICIRGFVY NVSPYMEYHP GGEDELMRAA
110 120 130 140 150
GSDGTDLFDQ VHRWVNYESM LKECLVGRMA MKPALPKDYH EEKKVLNGML
160 170 180 190 200
PQSQVTDTLA KEGPSSPSYD WFQTDSLVTI VIYTKQKDIN LDSVIVDHRD
210 220 230 240 250
DSFRAETVIK DYSYLVHVAL SHEIQEDFSV LVVENVGKIE IVLKKKENTS
260 270 280 290 300
WKCLGHPQEN HNSFIPKKDT GLFYRKCQLV SKEDVTHDTK LFCLMLPPST
310 320 330 340 350
HLEVPVGQHV YLRLPITGTE IVKPYTPVCD SLFSEFKEPV LPNNIYIYFL
360 370 380 390 400
IKIYPAGFFT PELDQLQIGD YVSVSNPEGN FIISQLQELE DLFLLAAGTG
410 420 430 440 450
FTPMVKVLNY ALTNIPSLRK VKLMFFNKTE DDIIWRSQLE KLAFKDKRFE
460 470 480 490 500
VEFVLSAPTS EWSGKQGYIS PALLSEFLKR RSDTSKVLIC LCGPTPFTEQ
510 520
GMKMLHDLNF SKDEIHSFTA
Length:520
Mass (Da):59,274
Last modified:December 6, 2005 - v1
<p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:iD855FF27A7A9AF2C
GO

<p>In eukaryotic reference proteomes, unreviewed entries that are likely to belong to the same gene are computationally mapped, based on gene identifiers from Ensembl, EnsemblGenomes and model organism databases.<p><a href='/help/gene_centric_isoform_mapping' target='_top'>More...</a></p>Computationally mapped potential isoform sequencesi

There are 2 potential isoforms mapped to this entry.BLASTAlignShow allAdd to basket
EntryEntry nameProtein names
Gene namesLengthAnnotation
F1MB85F1MB85_BOVIN
Cytochrome b5 reductase 4
CYB5R4
473Annotation score:

Annotation score:2 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
A0A3Q1M485A0A3Q1M485_BOVIN
Cytochrome b5 reductase 4
CYB5R4
510Annotation score:

Annotation score:2 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...
EMBLi

GenBank nucleotide sequence database

More...
GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
BC109569 mRNA Translation: AAI09570.1

NCBI Reference Sequences

More...
RefSeqi
NP_001033248.1, NM_001038159.1

Genome annotation databases

Ensembl eukaryotic genome annotation project

More...
Ensembli
ENSBTAT00000084559; ENSBTAP00000067057; ENSBTAG00000013591

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
533608

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
bta:533608

<p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BC109569 mRNA Translation: AAI09570.1
RefSeqiNP_001033248.1, NM_001038159.1

3D structure databases

SMRiQ32LH7
ModBaseiSearch...

Protein-protein interaction databases

STRINGi9913.ENSBTAP00000051953

Proteomic databases

PaxDbiQ32LH7
PRIDEiQ32LH7

Genome annotation databases

EnsembliENSBTAT00000084559; ENSBTAP00000067057; ENSBTAG00000013591
GeneIDi533608
KEGGibta:533608

Organism-specific databases

Comparative Toxicogenomics Database

More...
CTDi
51167
VGNCiVGNC:50264, CYB5R4

Phylogenomic databases

eggNOGiKOG0534, Eukaryota
KOG0536, Eukaryota
GeneTreeiENSGT00940000155536
InParanoidiQ32LH7
KOiK00326
OrthoDBi1311668at2759

Gene expression databases

ExpressionAtlasiQ32LH7, baseline and differential

Family and domain databases

CDDicd06490, p23_NCB5OR, 1 hit
Gene3Di2.60.40.790, 1 hit
3.10.120.10, 1 hit
3.40.50.80, 1 hit
InterProiView protein in InterPro
IPR001834, CBR-like
IPR008333, Cbr1-like_FAD-bd_dom
IPR007052, CS_dom
IPR001199, Cyt_B5-like_heme/steroid-bd
IPR036400, Cyt_B5-like_heme/steroid_sf
IPR018506, Cyt_B5_heme-BS
IPR017927, FAD-bd_FR_type
IPR039261, FNR_nucleotide-bd
IPR008978, HSP20-like_chaperone
IPR001433, OxRdtase_FAD/NAD-bd
IPR037908, p23_NCB5OR
IPR017938, Riboflavin_synthase-like_b-brl
PfamiView protein in Pfam
PF04969, CS, 1 hit
PF00173, Cyt-b5, 1 hit
PF00970, FAD_binding_6, 1 hit
PF00175, NAD_binding_1, 1 hit
PRINTSiPR00406, CYTB5RDTASE
PR00363, CYTOCHROMEB5
SMARTiView protein in SMART
SM01117, Cyt-b5, 1 hit
SUPFAMiSSF49764, SSF49764, 1 hit
SSF52343, SSF52343, 1 hit
SSF55856, SSF55856, 1 hit
SSF63380, SSF63380, 1 hit
PROSITEiView protein in PROSITE
PS51203, CS, 1 hit
PS00191, CYTOCHROME_B5_1, 1 hit
PS50255, CYTOCHROME_B5_2, 1 hit
PS51384, FAD_FR, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
Search...

MobiDB: a database of protein disorder and mobility annotations

More...
MobiDBi
Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the 'Entry information' section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiNB5R4_BOVIN
<p>This subsection of the 'Entry information' section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called 'Primary (citable) accession number'.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: Q32LH7
<p>This subsection of the 'Entry information' section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification ('Last modified'). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: May 15, 2007
Last sequence update: December 6, 2005
Last modified: August 12, 2020
This is version 97 of the entry and version 1 of the sequence. See complete history.
<p>This subsection of the 'Entry information' section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

<p>This section contains any relevant information that doesn't fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi

Keywords - Technical termi

Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families
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