Skip Header

You are using a version of browser that may not display all the features of this website. Please consider upgrading your browser.
Entry version 125 (07 Apr 2021)
Sequence version 1 (01 May 2000)
Previous versions | rss
Add a publicationFeedback
Protein

Succinate dehydrogenase [ubiquinone] flavoprotein subunit, mitochondrial

Gene

sdhA

Organism
Dictyostelium discoideum (Slime mold)
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>
-Protein inferred from homologyi <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

Flavoprotein (FP) 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 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

<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).By similarity 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.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<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 sitei253FADBy similarity1
Binding sitei274SubstrateBy similarity1
Binding sitei286SubstrateBy similarity1
<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">Function</a> section is used for enzymes and indicates the residues directly involved in catalysis.<p><a href='/help/act_site' target='_top'>More...</a></p>Active sitei318Proton acceptorBy similarity1
Binding sitei385SubstrateBy similarity1
Binding sitei418FADBy similarity1
Binding sitei429SubstrateBy similarity1

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 bindingi46 – 51FADBy similarity6
Nucleotide bindingi69 – 84FADBy similarityAdd BLAST16
Nucleotide bindingi434 – 435FADBy similarity2

<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
Biological processElectron transport, Transport, Tricarboxylic acid cycle
LigandFAD, Flavoprotein

Enzyme and pathway databases

Reactome - a knowledgebase of biological pathways and processes

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

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:
Succinate dehydrogenase [ubiquinone] flavoprotein subunit, mitochondrial (EC:1.3.5.1By similarity)
Alternative name(s):
Flavoprotein subunit of complex II
Short name:
FP
<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:sdhA
ORF Names:DDB_G0280535
<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>OrganismiDictyostelium discoideum (Slime mold)
<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 identifieri44689 [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 lineageiEukaryotaAmoebozoaEvoseaEumycetozoaDictyosteliaDictyostelialesDictyosteliaceaeDictyostelium
<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
  • UP000002195 <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> Componentsi: Chromosome 3, Unassembled WGS sequence

Organism-specific databases

Dictyostelium discoideum online informatics resource

More...
dictyBasei
DDB_G0280535, sdhA

<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

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 – 24MitochondrionSequence analysisAdd BLAST24
<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_000032782825 – 626Succinate dehydrogenase [ubiquinone] flavoprotein subunit, mitochondrialAdd BLAST602

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 residuei77Tele-8alpha-FAD histidineBy similarity1

Proteomic databases

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

More...
PaxDbi
Q9U3X4

PRoteomics IDEntifications database

More...
PRIDEi
Q9U3X4

<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: a flavoprotein (FP), an iron-sulfur protein (IP), and a cytochrome b composed of a large and a small subunit.

By similarity

Protein-protein interaction databases

STRING: functional protein association networks

More...
STRINGi
44689.DDB0214886

<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
Q9U3X4

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

Keywords - Domaini

Transit peptide

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
KOG2403, Eukaryota

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_014312_6_1_1

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
Q9U3X4

Identification of Orthologs from Complete Genome Data

More...
OMAi
DPIPIQP

Database for complete collections of gene phylogenies

More...
PhylomeDBi
Q9U3X4

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
3.50.50.60, 1 hit
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
IPR011281, Succ_DH_flav_su_fwd
IPR014006, Succ_Dhase_FrdA_Gneg

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

TIGRFAMs; a protein family database

More...
TIGRFAMsi
TIGR01816, sdhA_forward, 1 hit
TIGR01812, sdhA_frdA_Gneg, 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>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.

Q9U3X4-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MLSSALKLTK KVCSTKSNGL IRSFSTQTQS RDYAVVDHTY DAIVVGAGGA
60 70 80 90 100
GLRAALGLTE KGYKTACITK LFPTRSHTVA AQGGINAALG NADQDDWRWH
110 120 130 140 150
AYDTVKGSDF LGDQDAIHYM CKEAVPTVLE LEQYGVPFSR MDDGRIYQRA
160 170 180 190 200
FGGQSKNFGK GGQATRCCAA ADRTGHALLH TLYGQAVKHN TKFFIEYFVT
210 220 230 240 250
DLIMENGDCR GVVAINLEDG TIHRFRSHAT VIATGGYGRA YFSATSAHTC
260 270 280 290 300
TGDGNAMVIR AGLPCQDLEF VQFHPTGIYG SGCLITEGAR GEGGYLLNSS
310 320 330 340 350
GERFMPRYAP SVADLASRDV VSRSETMEIR EGRGVGPEKD HCLLNLTHLS
360 370 380 390 400
PEIIDERLPG IRETAMIFAG VDVTKEPIPV IPTVHYNMGG IPTNYKGQVI
410 420 430 440 450
TQVDGKDKLV KGLYAAGESA CVSVHGANRL GANSLLDIVV FGRAVANEIE
460 470 480 490 500
NTLAKDTPHK PLPPNAGEES IANIDAIRFS NGTRSTAEIR LEMQKIMQRN
510 520 530 540 550
AAVFRDGQVL KEGVELIDKC ARSLINDLKT TDRTMIWNTD LIESLELQNL
560 570 580 590 600
MTQAVLTMHS AEARKESRGA HAREDYKERD DANWMKHTLS YLDVNTGKVT
610 620
LNYRPVVSET LDQSEMETIK PFKRVY
Length:626
Mass (Da):68,516
Last modified:May 1, 2000 - 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:iC8F27868BD063D67
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
AF211482 Genomic DNA Translation: AAF21045.1
AAFI02000037 Genomic DNA Translation: EAL67069.1

NCBI Reference Sequences

More...
RefSeqi
XP_641069.1, XM_635977.1

Genome annotation databases

Ensembl protists genome annotation project

More...
EnsemblProtistsi
EAL67069; EAL67069; DDB_G0280535

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
8622627

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
ddi:DDB_G0280535

<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
AF211482 Genomic DNA Translation: AAF21045.1
AAFI02000037 Genomic DNA Translation: EAL67069.1
RefSeqiXP_641069.1, XM_635977.1

3D structure databases

SMRiQ9U3X4
ModBaseiSearch...

Protein-protein interaction databases

STRINGi44689.DDB0214886

Proteomic databases

PaxDbiQ9U3X4
PRIDEiQ9U3X4

Genome annotation databases

EnsemblProtistsiEAL67069; EAL67069; DDB_G0280535
GeneIDi8622627
KEGGiddi:DDB_G0280535

Organism-specific databases

dictyBaseiDDB_G0280535, sdhA

Phylogenomic databases

eggNOGiKOG2403, Eukaryota
HOGENOMiCLU_014312_6_1_1
InParanoidiQ9U3X4
OMAiDPIPIQP
PhylomeDBiQ9U3X4

Enzyme and pathway databases

UniPathwayiUPA00223;UER01006
ReactomeiR-DDI-71403, Citric acid cycle (TCA cycle)

Miscellaneous databases

Protein Ontology

More...
PROi
PR:Q9U3X4

Family and domain databases

Gene3Di3.50.50.60, 1 hit
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
IPR011281, Succ_DH_flav_su_fwd
IPR014006, Succ_Dhase_FrdA_Gneg
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
TIGRFAMsiTIGR01816, sdhA_forward, 1 hit
TIGR01812, sdhA_frdA_Gneg, 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 nameiSDHA_DICDI
<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: Q9U3X4
Secondary accession number(s): Q54V62
<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: April 8, 2008
Last sequence update: May 1, 2000
Last modified: April 7, 2021
This is version 125 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)

<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. Dictyostelium discoideum
    Dictyostelium discoideum: entries, gene names and cross-references to dictyBase
  2. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  3. SIMILARITY comments
    Index of protein domains and families
UniProt is an ELIXIR core data resource
Main funding by: National Institutes of Health

We'd like to inform you that we have updated our Privacy Notice to comply with Europe’s new General Data Protection Regulation (GDPR) that applies since 25 May 2018.

Do not show this banner again