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Protein

Succinate dehydrogenase [ubiquinone] iron-sulfur subunit

Gene

SDH2

Organism
Chondrus crispus (Carrageen Irish moss) (Polymorpha crispa)
Status
Reviewed-Annotation score: Annotation score: 4 out of 5-Protein inferred from homologyi

Functioni

Iron-sulfur protein (IP) 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

Catalytic activityi

Succinate + a quinone = fumarate + a quinol.

Cofactori

Protein has several cofactor binding sites:

Pathwayi

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Metal bindingi73 – 731Iron-sulfur 1 (2Fe-2S)By similarity
Metal bindingi78 – 781Iron-sulfur 1 (2Fe-2S)By similarity
Metal bindingi81 – 811Iron-sulfur 1 (2Fe-2S)By similarity
Metal bindingi93 – 931Iron-sulfur 1 (2Fe-2S)By similarity
Metal bindingi163 – 1631Iron-sulfur 2 (4Fe-4S)By similarity
Metal bindingi166 – 1661Iron-sulfur 2 (4Fe-4S)By similarity
Metal bindingi169 – 1691Iron-sulfur 2 (4Fe-4S)By similarity
Metal bindingi173 – 1731Iron-sulfur 3 (3Fe-4S)By similarity
Binding sitei178 – 1781Ubiquinone; shared with DHSDBy similarity
Metal bindingi220 – 2201Iron-sulfur 3 (3Fe-4S)By similarity
Metal bindingi226 – 2261Iron-sulfur 3 (3Fe-4S)By similarity
Metal bindingi230 – 2301Iron-sulfur 2 (4Fe-4S)By similarity

GO - Molecular functioni

  1. 2 iron, 2 sulfur cluster binding Source: UniProtKB-KW
  2. 3 iron, 4 sulfur cluster binding Source: UniProtKB-KW
  3. 4 iron, 4 sulfur cluster binding Source: UniProtKB-KW
  4. electron carrier activity Source: InterPro
  5. metal ion binding Source: UniProtKB-KW
  6. succinate dehydrogenase (ubiquinone) activity Source: UniProtKB-EC

GO - Biological processi

  1. tricarboxylic acid cycle Source: UniProtKB-UniPathway
Complete GO annotation...

Keywords - Molecular functioni

Oxidoreductase

Keywords - Biological processi

Electron transport, Transport, Tricarboxylic acid cycle

Keywords - Ligandi

2Fe-2S, 3Fe-4S, 4Fe-4S, Iron, Iron-sulfur, Metal-binding

Enzyme and pathway databases

UniPathwayiUPA00223; UER01006.

Names & Taxonomyi

Protein namesi
Recommended name:
Succinate dehydrogenase [ubiquinone] iron-sulfur subunit (EC:1.3.5.1)
Alternative name(s):
Iron-sulfur subunit of complex II
Short name:
Ip
Gene namesi
Name:SDH2
Synonyms:SDHB
Encoded oniMitochondrion
OrganismiChondrus crispus (Carrageen Irish moss) (Polymorpha crispa)
Taxonomic identifieri2769 [NCBI]
Taxonomic lineageiEukaryotaRhodophytaFlorideophyceaeGigartinalesGigartinaceaeChondrus

Subcellular locationi

  1. Mitochondrion inner membrane By similarity; Peripheral membrane protein By similarity; Matrix side By similarity

GO - Cellular componenti

  1. mitochondrial inner membrane Source: UniProtKB-SubCell
Complete GO annotation...

Keywords - Cellular componenti

Membrane, Mitochondrion, Mitochondrion inner membrane

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 250250Succinate dehydrogenase [ubiquinone] iron-sulfur subunitPRO_0000158694Add
BLAST

Interactioni

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

Structurei

3D structure databases

ProteinModelPortaliP48932.
SMRiP48932. Positions 18-244.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Domaini30 – 110812Fe-2S ferredoxin-typePROSITE-ProRule annotationAdd
BLAST
Domaini153 – 183314Fe-4S ferredoxin-typePROSITE-ProRule annotationAdd
BLAST

Sequence similaritiesi

Contains 1 2Fe-2S ferredoxin-type domain.PROSITE-ProRule annotation
Contains 1 4Fe-4S ferredoxin-type domain.PROSITE-ProRule annotation

Phylogenomic databases

KOiK00235.

Family and domain databases

Gene3Di3.10.20.30. 1 hit.
InterProiIPR001041. 2Fe-2S_ferredoxin-type.
IPR006058. 2Fe2S_fd_BS.
IPR017896. 4Fe4S_Fe-S-bd.
IPR017900. 4Fe4S_Fe_S_CS.
IPR012675. Beta-grasp_dom.
IPR009051. Helical_ferredxn.
IPR004489. Succ_DH/fum_Rdtase_Fe-S.
IPR025192. Succ_DH/fum_Rdtase_N.
[Graphical view]
PfamiPF13085. Fer2_3. 1 hit.
[Graphical view]
SUPFAMiSSF46548. SSF46548. 1 hit.
SSF54292. SSF54292. 1 hit.
TIGRFAMsiTIGR00384. dhsB. 1 hit.
PROSITEiPS00197. 2FE2S_FER_1. 1 hit.
PS51085. 2FE2S_FER_2. 1 hit.
PS00198. 4FE4S_FER_1. 1 hit.
PS51379. 4FE4S_FER_2. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

P48932-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MIIKNLNQKI ITIDNSSPYQ KFIRIYRWNP NLNLNPWFSI FPISTNNCGP
60 70 80 90 100
MILDALIQIK NIQDSSLTFR RSCREGICGS CSMNIDGTNS LACLRSLNTK
110 120 130 140 150
SNFITIYPLP HTYIIKDLVP DLSNFYAQYK LIKPWLINKI GFSLKENLQS
160 170 180 190 200
KIDRLELDGL YECILCACCS ASCPSYWWNQ DKYLGPAILL QAYRWIVDSR
210 220 230 240 250
DNSTENRLNF LNNKMRLFRC HTIMNCSKTC PKSLNPGKAI ASIKYRIINN
Length:250
Mass (Da):28,887
Last modified:February 1, 1996 - v1
Checksum:i09511AE52A4CA149
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
Z47547 Genomic DNA. Translation: CAA87611.1.
PIRiS59114.
RefSeqiNP_062488.1. NC_001677.2.

Genome annotation databases

GeneIDi809396.
KEGGiccp:ChcroMp09.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
Z47547 Genomic DNA. Translation: CAA87611.1.
PIRiS59114.
RefSeqiNP_062488.1. NC_001677.2.

3D structure databases

ProteinModelPortaliP48932.
SMRiP48932. Positions 18-244.
ModBaseiSearch...
MobiDBiSearch...

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

GeneIDi809396.
KEGGiccp:ChcroMp09.

Phylogenomic databases

KOiK00235.

Enzyme and pathway databases

UniPathwayiUPA00223; UER01006.

Family and domain databases

Gene3Di3.10.20.30. 1 hit.
InterProiIPR001041. 2Fe-2S_ferredoxin-type.
IPR006058. 2Fe2S_fd_BS.
IPR017896. 4Fe4S_Fe-S-bd.
IPR017900. 4Fe4S_Fe_S_CS.
IPR012675. Beta-grasp_dom.
IPR009051. Helical_ferredxn.
IPR004489. Succ_DH/fum_Rdtase_Fe-S.
IPR025192. Succ_DH/fum_Rdtase_N.
[Graphical view]
PfamiPF13085. Fer2_3. 1 hit.
[Graphical view]
SUPFAMiSSF46548. SSF46548. 1 hit.
SSF54292. SSF54292. 1 hit.
TIGRFAMsiTIGR00384. dhsB. 1 hit.
PROSITEiPS00197. 2FE2S_FER_1. 1 hit.
PS51085. 2FE2S_FER_2. 1 hit.
PS00198. 4FE4S_FER_1. 1 hit.
PS51379. 4FE4S_FER_2. 1 hit.
[Graphical view]
ProtoNetiSearch...

Publicationsi

  1. "Genes for two subunits of succinate dehydrogenase form a cluster on the mitochondrial genome of Rhodophyta."
    Viehmann S., Richard O., Boyen C., Zetsche K.
    Curr. Genet. 29:199-201(1996) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].
  2. "Complete sequence of the mitochondrial DNA of the rhodophyte Chondrus crispus (Gigartinales). Gene content and genome organization."
    Leblanc C., Boyen C., Richard O., Bonnard G., Grienenberger J.-M., Kloareg B.
    J. Mol. Biol. 250:484-495(1995) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].
    Tissue: Apices.

Entry informationi

Entry nameiSDHB_CHOCR
AccessioniPrimary (citable) accession number: P48932
Entry historyi
Integrated into UniProtKB/Swiss-Prot: February 1, 1996
Last sequence update: February 1, 1996
Last modified: April 29, 2015
This is version 98 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)

Miscellaneousi

Documents

  1. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  2. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into Uniref entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.