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Entry version 175 (29 Sep 2021)
Sequence version 2 (29 Apr 2008)
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Protein

NADH-cytochrome b5 reductase 1

Gene

CBR1

Organism
Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (Baker's yeast)
Status
Reviewed-Annotation score:

Annotation score:5 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 protein 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

Electron donor reductase for cytochrome b5. The cytochrome b5/NADH cytochrome b5 reductase electron transfer system supports the catalytic activity of several sterol biosynthetic enzymes. Plays a role in bud morphology.

1 Publication

Miscellaneous

Present with 4820 molecules/cell in log phase SD medium.1 Publication

<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">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

FAD

<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">Function</a> section describes regulatory mechanisms for enzymes, transporters or microbial transcription factors, and reports the components which regulate (by activation or inhibition) the reaction.<p><a href='/help/activity_regulation' target='_top'>More...</a></p>Activity regulationi

Competitively inhibited by NAD+. Inhibited by mercurials such as p-chloromercuribenzoate (PCMB) and HgCl2. Enzymatic activity increases under anaerobic conditions.2 Publications

<p>This subsection of the 'Function' section describes biophysical and chemical properties, such as maximal absorption, kinetic parameters, pH dependence, redox potentials and temperature dependence.<p><a href='/help/biophysicochemical_properties' target='_top'>More...</a></p>Kineticsi

  1. KM=6.3 µM for NADH1 Publication
  2. KM=0.8 µM for cytochrome b51 Publication

pH dependencei

Optimum pH is 5.6. Active from pH 5 to 7.5.1 Publication

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">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 bindingi122 – 137FADBy similarityAdd BLAST16
Nucleotide bindingi148 – 180FADBy 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

<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, NAD

Enzyme and pathway databases

BioCyc Collection of Pathway/Genome Databases

More...
BioCyci
MetaCyc:YIL043C-MONOMER

SABIO-RK: Biochemical Reaction Kinetics Database

More...
SABIO-RKi
P38626

<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_and_taxonomy_section">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:
NADH-cytochrome b5 reductase 1 (EC:1.6.2.2)
Alternative name(s):
Microsomal cytochrome b reductase
P35
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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:CBR1
Synonyms:CBR, CBR5
Ordered Locus Names:YIL043C
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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>OrganismiSaccharomyces cerevisiae (strain ATCC 204508 / S288c) (Baker's yeast)
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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 identifieri559292 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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 lineageiEukaryotaFungiDikaryaAscomycotaSaccharomycotinaSaccharomycetesSaccharomycetalesSaccharomycetaceaeSaccharomyces
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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
  • UP000002311 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes_manual">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 IX

Organism-specific databases

Saccharomyces Genome Database

More...
SGDi
S000001305, CBR1

Eukaryotic Pathogen, Vector and Host Database Resources

More...
VEuPathDBi
FungiDB:YIL043C

<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

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular_location_section">'Subcellular location'</a> section describes the extent of a membrane-spanning region of the protein. It denotes the presence of both alpha-helical transmembrane regions and the membrane spanning regions of beta-barrel transmembrane proteins.<p><a href='/help/transmem' target='_top'>More...</a></p>Transmembranei7 – 27HelicalSequence analysisAdd BLAST21

Keywords - Cellular componenti

Endoplasmic reticulum, Membrane, Mitochondrion, Mitochondrion outer membrane

<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_00001676271 – 284NADH-cytochrome b5 reductase 1Add BLAST284

Proteomic databases

MaxQB - The MaxQuant DataBase

More...
MaxQBi
P38626

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

More...
PaxDbi
P38626

PRoteomics IDEntifications database

More...
PRIDEi
P38626

PTM databases

iPTMnet integrated resource for PTMs in systems biology context

More...
iPTMneti
P38626

<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

<p>This subsection of the 'Expression' section reports the experimentally proven effects of inducers and repressors (usually chemical compounds or environmental factors) on the level of protein (or mRNA) expression (up-regulation, down-regulation, constitutive expression).<p><a href='/help/induction' target='_top'>More...</a></p>Inductioni

Protein levels are highest during exponential growth phase and lowest in stationary phase.1 Publication

<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

<p>This subsection of the <a href="http://www.uniprot.org/help/interaction_section">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function_section">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Monomer.

Interacts with STE20.

2 Publications

Protein-protein interaction databases

The Biological General Repository for Interaction Datasets (BioGRID)

More...
BioGRIDi
34947, 124 interactors

Protein interaction database and analysis system

More...
IntActi
P38626, 7 interactors

Molecular INTeraction database

More...
MINTi
P38626

STRING: functional protein association networks

More...
STRINGi
4932.YIL043C

Miscellaneous databases

RNAct, Protein-RNA interaction predictions for model organisms.

More...
RNActi
P38626, protein

<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
P38626

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_and_domains_section">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>Domaini38 – 142FAD-binding FR-typePROSITE-ProRule annotationAdd BLAST105

<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

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
KOG0534, Eukaryota

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_003827_9_0_1

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
P38626

Identification of Orthologs from Complete Genome Data

More...
OMAi
KDMRFSF

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
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
IPR017927, FAD-bd_FR_type
IPR001709, Flavoprot_Pyr_Nucl_cyt_Rdtase
IPR039261, FNR_nucleotide-bd
IPR001433, OxRdtase_FAD/NAD-bd
IPR017938, Riboflavin_synthase-like_b-brl

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00970, FAD_binding_6, 1 hit
PF00175, NAD_binding_1, 1 hit

Protein Motif fingerprint database; a protein domain database

More...
PRINTSi
PR00406, CYTB5RDTASE
PR00371, FPNCR

Superfamily database of structural and functional annotation

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

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
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_length">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>Sequencei

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">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.

P38626-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MAIDAQKLVV VIVIVVVPLL FKFIIGPKTK PVLDPKRNDF QSFPLVEKTI
60 70 80 90 100
LTHNTSMYKF GLPHADDVLG LPIGQHIVIK ANINGKDITR SYTPTSLDGD
110 120 130 140 150
TKGNFELLVK SYPTGNVSKM IGELKIGDSI QIKGPRGNYH YERNCRSHLG
160 170 180 190 200
MIAGGTGIAP MYQIMKAIAM DPHDTTKVSL VFGNVHEEDI LLKKELEALV
210 220 230 240 250
AMKPSQFKIV YYLDSPDRED WTGGVGYITK DVIKEHLPAA TMDNVQILIC
260 270 280
GPPAMVASVR RSTVDLGFRR SKPLSKMEDQ VFVF
Length:284
Mass (Da):31,494
Last modified:April 29, 2008 - v2
<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:i0E71E7AB083BB623
GO

<p>This subsection of the 'Sequence' section reports difference(s) between the protein sequence shown in the UniProtKB entry and other available protein sequences derived from the same gene.<p><a href='/help/sequence_caution' target='_top'>More...</a></p>Sequence cautioni

The sequence CAA82214 differs from that shown. Reason: Erroneous initiation.Curated
The sequence CAA86908 differs from that shown. Reason: Erroneous initiation.Curated

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
Z28365 Genomic DNA Translation: CAA82214.1 Different initiation.
Z46861 Genomic DNA Translation: CAA86908.1 Different initiation.
BK006942 Genomic DNA Translation: DAA08505.1

Protein sequence database of the Protein Information Resource

More...
PIRi
S49935

NCBI Reference Sequences

More...
RefSeqi
NP_012221.2, NM_001179393.1

Genome annotation databases

Ensembl fungal genome annotation project

More...
EnsemblFungii
YIL043C_mRNA; YIL043C; YIL043C

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
854768

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
sce:YIL043C

<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
Z28365 Genomic DNA Translation: CAA82214.1 Different initiation.
Z46861 Genomic DNA Translation: CAA86908.1 Different initiation.
BK006942 Genomic DNA Translation: DAA08505.1
PIRiS49935
RefSeqiNP_012221.2, NM_001179393.1

3D structure databases

SMRiP38626
ModBaseiSearch...

Protein-protein interaction databases

BioGRIDi34947, 124 interactors
IntActiP38626, 7 interactors
MINTiP38626
STRINGi4932.YIL043C

PTM databases

iPTMnetiP38626

Proteomic databases

MaxQBiP38626
PaxDbiP38626
PRIDEiP38626

Genome annotation databases

EnsemblFungiiYIL043C_mRNA; YIL043C; YIL043C
GeneIDi854768
KEGGisce:YIL043C

Organism-specific databases

SGDiS000001305, CBR1
VEuPathDBiFungiDB:YIL043C

Phylogenomic databases

eggNOGiKOG0534, Eukaryota
HOGENOMiCLU_003827_9_0_1
InParanoidiP38626
OMAiKDMRFSF

Enzyme and pathway databases

BioCyciMetaCyc:YIL043C-MONOMER
SABIO-RKiP38626

Miscellaneous databases

Protein Ontology

More...
PROi
PR:P38626
RNActiP38626, protein

Family and domain databases

Gene3Di3.40.50.80, 1 hit
InterProiView protein in InterPro
IPR001834, CBR-like
IPR008333, Cbr1-like_FAD-bd_dom
IPR017927, FAD-bd_FR_type
IPR001709, Flavoprot_Pyr_Nucl_cyt_Rdtase
IPR039261, FNR_nucleotide-bd
IPR001433, OxRdtase_FAD/NAD-bd
IPR017938, Riboflavin_synthase-like_b-brl
PfamiView protein in Pfam
PF00970, FAD_binding_6, 1 hit
PF00175, NAD_binding_1, 1 hit
PRINTSiPR00406, CYTB5RDTASE
PR00371, FPNCR
SUPFAMiSSF52343, SSF52343, 1 hit
SSF63380, SSF63380, 1 hit
PROSITEiView protein in PROSITE
PS51384, FAD_FR, 1 hit

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 nameiNCB5R_YEAST
<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: P38626
Secondary accession number(s): D6VVN9
<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_and_isoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: October 1, 1994
Last sequence update: April 29, 2008
Last modified: September 29, 2021
This is version 175 of the entry and version 2 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 programFungal 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. Yeast
    Yeast (Saccharomyces cerevisiae): entries, gene names and cross-references to SGD
  2. Yeast chromosome IX
    Yeast (Saccharomyces cerevisiae) chromosome IX: entries and gene names
  3. SIMILARITY comments
    Index of protein domains and families
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