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Entry version 41 (29 Sep 2021)
Sequence version 1 (29 Oct 2014)
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Protein

Flavoprotein subunit of complex II

Gene

SDHA

Organism
Homo sapiens (Human)
Status
Unreviewed-Annotation 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>
-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

<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

FADARBA annotation

<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 step 1 of the subpathway that synthesizes fumarate from succinate (eukaryal route).ARBA annotation This subpathway is part of the pathway tricarboxylic acid cycle, which is itself part of Carbohydrate metabolism.
View all proteins of this organism that are known to be involved in the subpathway that synthesizes fumarate from succinate (eukaryal route), the pathway tricarboxylic acid cycle and in Carbohydrate metabolism.

<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 functionOxidoreductaseARBA annotation
Biological processElectron transportARBA annotation, Transport
LigandFlavoproteinARBA annotation

Enzyme and pathway databases

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

More...
UniPathwayi
UPA00223;UER01006

<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:
Flavoprotein subunit of complex IIARBA annotation
Alternative name(s):
Succinate dehydrogenase [ubiquinone] flavoprotein subunit, mitochondrialARBA annotation
<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:SDHAImported
<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>OrganismiHomo sapiens (Human)Imported
<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 identifieri9606 [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 lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresPrimatesHaplorrhiniCatarrhiniHominidaeHomo
<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
  • UP000005640 <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 5

Organism-specific databases

Human Gene Nomenclature Database

More...
HGNCi
HGNC:10680, SDHA

Eukaryotic Pathogen, Vector and Host Database Resources

More...
VEuPathDBi
HostDB:ENSG00000073578

<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

Keywords - Cellular componenti

MembraneARBA annotation

<p>This section provides information on the disease(s) and phenotype(s) associated with a protein.<p><a href='/help/pathology_and_biotech_section' target='_top'>More...</a></p>Pathology & Biotechi

Organism-specific databases

Open Targets

More...
OpenTargetsi
ENSG00000073578

<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

Proteomic databases

PeptideAtlas

More...
PeptideAtlasi
A0A087X1I3

<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
ENSG00000073578, Expressed in apex of heart and 121 other tissues

ExpressionAtlas, Differential and Baseline Expression

More...
ExpressionAtlasi
A0A087X1I3, baseline and differential

<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
A0A087X1I3

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>Domaini127 – 312FAD_binding_2InterPro annotationAdd BLAST186
Domaini367 – 519Succ_DH_flav_CInterPro annotationAdd BLAST153

<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 FAD-dependent oxidoreductase 2 family. FRD/SDH subfamily.ARBA annotation

Phylogenomic databases

Ensembl GeneTree

More...
GeneTreei
ENSGT00910000144277

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
3.50.50.60, 2 hits
3.90.700.10, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR003953, FAD-binding_2
IPR036188, FAD/NAD-bd_sf
IPR003952, FRD_SDH_FAD_BS
IPR037099, Fum_R/Succ_DH_flav-like_C_sf
IPR015939, Fum_Rdtase/Succ_DH_flav-like_C
IPR027477, Succ_DH/fumarate_Rdtase_cat_sf

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00890, FAD_binding_2, 1 hit
PF02910, Succ_DH_flav_C, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF46977, SSF46977, 1 hit
SSF51905, SSF51905, 1 hit
SSF56425, SSF56425, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS00504, FRD_SDH_FAD_BINDING, 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>Sequence (1+)i

<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.

This entry has 1 described isoform and 5 potential isoforms that are computationally mapped.Show allAlign All

A0A087X1I3-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MSGVRGLSRL LSARRLALAK AWPTVLQTGT RGFHFTVDGN KRASAKVSDS
60 70 80 90 100
ISAQYPVVDH EFDAVVVGAG GAGLRAAFGL SEAGFNTACV TKLFPTRSHT
110 120 130 140 150
VAAQGGINAA LGNMEEDNWR WHFYDTVTGD GTAMITRAGL PCQDLEFVQF
160 170 180 190 200
HPTGIYGAGC LITEGCRGEG GILINSQGER FMERYAPVAK DLASRDVVSR
210 220 230 240 250
SMTLEIREGR GCGPEKDHVY LQLHHLPPEQ LATRLPGISE TAMIFAGVDV
260 270 280 290 300
TKEPIPVLPT VHYNMGGIPT NYKGQVLRHV NGQDQIVPGL YACGEAACAS
310 320 330 340 350
VHGANRLGAN SLLDLVVFGR ACALSIEESC RPGDKVPPIK PNAGEESVMN
360 370 380 390 400
LDKLRFADGS IRTSELRLSM QKSMQNHAAV FRVGSVLQEG CGKISKLYGD
410 420 430 440 450
LKHLKTFDRG MVWNTDLVET LELQNLMLCA LQTIYGAEAR KESRGAHARE
460 470 480 490 500
DYKVRIDEYD YSKPIQGQQK KPFEEHWRKH TLSYVDVGTG KVTLEYRPVI
510
DKTLNEADCA TVPPAIRSY
Length:519
Mass (Da):56,663
Last modified:October 29, 2014 - 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:iE54ADF3B4E5839CA
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 5 potential isoforms mapped to this entry.BLASTAlignShow allAdd to basket
EntryEntry nameProtein names
Gene namesLengthAnnotation
P31040SDHA_HUMAN
Succinate dehydrogenase [ubiquinone...
SDHA SDH2, SDHF
664Annotation 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>
D6RFM5D6RFM5_HUMAN
Succinate dehydrogenase [ubiquinone...
SDHA
583Annotation score:

Annotation score:3 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>
H0Y8X1H0Y8X1_HUMAN
Succinate dehydrogenase [ubiquinone...
SDHA
126Annotation score:

Annotation score:1 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>
H0Y8S2H0Y8S2_HUMAN
Succinate dehydrogenase [ubiquinone...
SDHA
101Annotation score:

Annotation score:1 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>
D6REB7D6REB7_HUMAN
Succinate dehydrogenase [ubiquinone...
SDHA
89Annotation score:

Annotation score:1 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
AC021087 Genomic DNA No translation available.

Genome annotation databases

Ensembl eukaryotic genome annotation project

More...
Ensembli
ENST00000617470; ENSP00000484230; ENSG00000073578

UCSC genome browser

More...
UCSCi
uc063buu.1, human

<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
AC021087 Genomic DNA No translation available.

3D structure databases

SMRiA0A087X1I3
ModBaseiSearch...

Proteomic databases

PeptideAtlasiA0A087X1I3

Protocols and materials databases

Antibodypedia a portal for validated antibodies

More...
Antibodypediai
22208, 388 antibodies

Genome annotation databases

EnsembliENST00000617470; ENSP00000484230; ENSG00000073578
UCSCiuc063buu.1, human

Organism-specific databases

HGNCiHGNC:10680, SDHA
OpenTargetsiENSG00000073578
VEuPathDBiHostDB:ENSG00000073578

GenAtlas: human gene database

More...
GenAtlasi
Search...

Phylogenomic databases

GeneTreeiENSGT00910000144277

Enzyme and pathway databases

UniPathwayiUPA00223;UER01006

Miscellaneous databases

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

More...
ChiTaRSi
SDHA, human

Gene expression databases

BgeeiENSG00000073578, Expressed in apex of heart and 121 other tissues
ExpressionAtlasiA0A087X1I3, baseline and differential

Family and domain databases

Gene3Di3.50.50.60, 2 hits
3.90.700.10, 1 hit
InterProiView protein in InterPro
IPR003953, FAD-binding_2
IPR036188, FAD/NAD-bd_sf
IPR003952, FRD_SDH_FAD_BS
IPR037099, Fum_R/Succ_DH_flav-like_C_sf
IPR015939, Fum_Rdtase/Succ_DH_flav-like_C
IPR027477, Succ_DH/fumarate_Rdtase_cat_sf
PfamiView protein in Pfam
PF00890, FAD_binding_2, 1 hit
PF02910, Succ_DH_flav_C, 1 hit
SUPFAMiSSF46977, SSF46977, 1 hit
SSF51905, SSF51905, 1 hit
SSF56425, SSF56425, 1 hit
PROSITEiView protein in PROSITE
PS00504, FRD_SDH_FAD_BINDING, 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 nameiA0A087X1I3_HUMAN
<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: A0A087X1I3
<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/TrEMBL: October 29, 2014
Last sequence update: October 29, 2014
Last modified: September 29, 2021
This is version 41 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 statusiUnreviewed (UniProtKB/TrEMBL)
DisclaimerAny medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care.

<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

Proteomics identificationCombined sources, Reference proteomeImported
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