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Entry version 122 (16 Oct 2019)
Sequence version 2 (01 Mar 2003)
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Protein

Succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial

Gene

Sdhd

Organism
Mus musculus (Mouse)
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

Membrane-anchoring subunit of succinate dehydrogenase (SDH) that is involved in complex II of the mitochondrial electron transport chain and is responsible for transferring electrons from succinate to ubiquinone (coenzyme Q).By similarity

<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">'Function'</a> section describes the metabolic pathway(s) associated with a protein.<p><a href='/help/pathway' target='_top'>More...</a></p>Pathwayi: tricarboxylic acid cycle

This protein is involved in the pathway tricarboxylic acid cycle, which is part of Carbohydrate metabolism.
View all proteins of this organism that are known to be involved in the pathway tricarboxylic acid cycle and in Carbohydrate metabolism.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">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 bindingi102Iron (heme axial ligand); shared with SDHCBy similarity1
<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">Function</a> section describes the interaction between a single amino acid and another chemical entity. Priority is given to the annotation of physiological ligands.<p><a href='/help/binding' target='_top'>More...</a></p>Binding sitei114Ubiquinone; shared with IP/SDHBBy similarity1

<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

Biological processElectron transport, Transport, Tricarboxylic acid cycle
LigandHeme, Iron, Metal-binding

Enzyme and pathway databases

Reactome - a knowledgebase of biological pathways and processes

More...
Reactomei
R-MMU-71403 Citric acid cycle (TCA cycle)

UniPathway: a resource for the exploration and annotation of metabolic pathways

More...
UniPathwayi
UPA00223

<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:
Succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial
Short name:
CybS
Alternative name(s):
CII-4
QPs3
Succinate dehydrogenase complex subunit D
Succinate-ubiquinone oxidoreductase cytochrome b small subunit
Succinate-ubiquinone reductase membrane anchor subunit
<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:Sdhd
<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>OrganismiMus musculus (Mouse)
<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 identifieri10090 [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 lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresGliresRodentiaMyomorphaMuroideaMuridaeMurinaeMusMus
<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
  • UP000000589 <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 9

Organism-specific databases

Mouse genome database (MGD) from Mouse Genome Informatics (MGI)

More...
MGIi
MGI:1914175 Sdhd

<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

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 subcellular compartment where each non-membrane region of a membrane-spanning protein is found.<p><a href='/help/topo_dom' target='_top'>More...</a></p>Topological domaini57 – 63Mitochondrial matrixBy similarity7
<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>Transmembranei64 – 85HelicalBy similarityAdd BLAST22
Topological domaini86 – 90Mitochondrial intermembraneBy similarity5
Transmembranei91 – 111HelicalBy similarityAdd BLAST21
Topological domaini112 – 120Mitochondrial matrixBy similarity9
Transmembranei121 – 142HelicalBy similarityAdd BLAST22
Topological domaini143 – 159Mitochondrial intermembraneBy similarityAdd BLAST17

Keywords - Cellular componenti

Membrane, Mitochondrion, Mitochondrion inner 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 transit peptide.<p><a href='/help/transit' target='_top'>More...</a></p>Transit peptidei1 – 56MitochondrionSequence analysisAdd BLAST56
<p>This subsection of the ‘PTM / Processing’ section describes the extent of a polypeptide chain in the mature protein following processing.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_000000648857 – 159Succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrialAdd BLAST103

Proteomic databases

jPOST - Japan Proteome Standard Repository/Database

More...
jPOSTi
Q9CXV1

MaxQB - The MaxQuant DataBase

More...
MaxQBi
Q9CXV1

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

More...
PaxDbi
Q9CXV1

PeptideAtlas

More...
PeptideAtlasi
Q9CXV1

PRoteomics IDEntifications database

More...
PRIDEi
Q9CXV1

Consortium for Top Down Proteomics

More...
TopDownProteomicsi
Q9CXV1

PTM databases

SwissPalm database of S-palmitoylation events

More...
SwissPalmi
Q9CXV1

<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

Bgee dataBase for Gene Expression Evolution

More...
Bgeei
ENSMUSG00000000171 Expressed in 331 organ(s), highest expression level in skeletal muscle tissue

Genevisible search portal to normalized and curated expression data from Genevestigator

More...
Genevisiblei
Q9CXV1 MM

<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

Component of complex II composed of four subunits: the flavoprotein (FP) SDHA, iron-sulfur protein (IP) SDHB, and a cytochrome b560 composed of SDHC and SDHD.

By similarity

Protein-protein interaction databases

ComplexPortal: manually curated resource of macromolecular complexes

More...
ComplexPortali
CPX-562 Mitochondrial respiratory chain complex II

CORUM comprehensive resource of mammalian protein complexes

More...
CORUMi
Q9CXV1

STRING: functional protein association networks

More...
STRINGi
10090.ENSMUSP00000000175

<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
Q9CXV1

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

<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

Belongs to the CybS family.Curated

Keywords - Domaini

Transit peptide, Transmembrane, Transmembrane helix

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
KOG4097 Eukaryota
ENOG4111RTW LUCA

Ensembl GeneTree

More...
GeneTreei
ENSGT00390000010003

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
HOG000290645

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
Q9CXV1

KEGG Orthology (KO)

More...
KOi
K00237

Identification of Orthologs from Complete Genome Data

More...
OMAi
PCSAVDY

Database of Orthologous Groups

More...
OrthoDBi
1511215at2759

Database for complete collections of gene phylogenies

More...
PhylomeDBi
Q9CXV1

TreeFam database of animal gene trees

More...
TreeFami
TF313310

Family and domain databases

Conserved Domains Database

More...
CDDi
cd03496 SQR_TypeC_CybS, 1 hit

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
1.20.1300.10, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR007992 CybS
IPR034804 SQR/QFR_C/D

The PANTHER Classification System

More...
PANTHERi
PTHR13337 PTHR13337, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF81343 SSF81343, 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.

<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 in its mature form or if it represents the precursor.<p><a href='/help/sequence_processing' target='_top'>More...</a></p>Sequence processingi: The displayed sequence is further processed into a mature form.

Q9CXV1-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MAVLLKLGVL CSGQGARALL LRSRVVRPAY VSAFLQDQPT QGRCGTQHIH
60 70 80 90 100
LSPSHHSGSK AASLHWTSER VVSVLLLGLI PAGYLNPCSV VDYSLAAALT
110 120 130 140 150
LHSHWGLGQV VTDYVHGDTL PKAARAGLLA LSALTFAGLC YFNYHDVGIC

RAVAMLWKL
Length:159
Mass (Da):17,014
Last modified:March 1, 2003 - 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:iCB3B3CB37E257A06
GO

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
AK013962 mRNA Translation: BAB29086.2
AK135970 mRNA Translation: BAE22752.1
BC145731 mRNA Translation: AAI45732.1
BC145733 mRNA Translation: AAI45734.1

The Consensus CDS (CCDS) project

More...
CCDSi
CCDS40623.1

NCBI Reference Sequences

More...
RefSeqi
NP_080124.1, NM_025848.3

Genome annotation databases

Ensembl eukaryotic genome annotation project

More...
Ensembli
ENSMUST00000000175; ENSMUSP00000000175; ENSMUSG00000000171

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
66925

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
mmu:66925

UCSC genome browser

More...
UCSCi
uc009pjv.2 mouse

<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
AK013962 mRNA Translation: BAB29086.2
AK135970 mRNA Translation: BAE22752.1
BC145731 mRNA Translation: AAI45732.1
BC145733 mRNA Translation: AAI45734.1
CCDSiCCDS40623.1
RefSeqiNP_080124.1, NM_025848.3

3D structure databases

SMRiQ9CXV1
ModBaseiSearch...

Protein-protein interaction databases

ComplexPortaliCPX-562 Mitochondrial respiratory chain complex II
CORUMiQ9CXV1
STRINGi10090.ENSMUSP00000000175

PTM databases

SwissPalmiQ9CXV1

Proteomic databases

jPOSTiQ9CXV1
MaxQBiQ9CXV1
PaxDbiQ9CXV1
PeptideAtlasiQ9CXV1
PRIDEiQ9CXV1
TopDownProteomicsiQ9CXV1

Genome annotation databases

EnsembliENSMUST00000000175; ENSMUSP00000000175; ENSMUSG00000000171
GeneIDi66925
KEGGimmu:66925
UCSCiuc009pjv.2 mouse

Organism-specific databases

Comparative Toxicogenomics Database

More...
CTDi
6392
MGIiMGI:1914175 Sdhd

Phylogenomic databases

eggNOGiKOG4097 Eukaryota
ENOG4111RTW LUCA
GeneTreeiENSGT00390000010003
HOGENOMiHOG000290645
InParanoidiQ9CXV1
KOiK00237
OMAiPCSAVDY
OrthoDBi1511215at2759
PhylomeDBiQ9CXV1
TreeFamiTF313310

Enzyme and pathway databases

UniPathwayiUPA00223
ReactomeiR-MMU-71403 Citric acid cycle (TCA cycle)

Miscellaneous databases

ChiTaRS: a database of human, mouse and fruit fly chimeric transcripts and RNA-sequencing data

More...
ChiTaRSi
Sdhd mouse

Protein Ontology

More...
PROi
PR:Q9CXV1

The Stanford Online Universal Resource for Clones and ESTs

More...
SOURCEi
Search...

Gene expression databases

BgeeiENSMUSG00000000171 Expressed in 331 organ(s), highest expression level in skeletal muscle tissue
GenevisibleiQ9CXV1 MM

Family and domain databases

CDDicd03496 SQR_TypeC_CybS, 1 hit
Gene3Di1.20.1300.10, 1 hit
InterProiView protein in InterPro
IPR007992 CybS
IPR034804 SQR/QFR_C/D
PANTHERiPTHR13337 PTHR13337, 1 hit
SUPFAMiSSF81343 SSF81343, 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 nameiDHSD_MOUSE
<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: Q9CXV1
Secondary accession number(s): A6H629, Q3UX11
<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: August 31, 2004
Last sequence update: March 1, 2003
Last modified: October 16, 2019
This is version 122 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 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

Complete proteome, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families
  2. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  3. MGD cross-references
    Mouse Genome Database (MGD) cross-references in UniProtKB/Swiss-Prot
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