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P48933

- SDHB_CYACA

UniProt

P48933 - SDHB_CYACA

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Protein
Succinate dehydrogenase [ubiquinone] iron-sulfur subunit
Gene
SDH2, SDHB
Organism
Cyanidium caldarium
Status
Reviewed - 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

Binds 1 2Fe-2S cluster By similarity.
Binds 1 3Fe-4S cluster By similarity.
Binds 1 4Fe-4S cluster By similarity.

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 bindingi164 – 1641Iron-sulfur 2 (4Fe-4S) By similarity
Metal bindingi167 – 1671Iron-sulfur 2 (4Fe-4S) By similarity
Metal bindingi170 – 1701Iron-sulfur 2 (4Fe-4S) By similarity
Metal bindingi174 – 1741Iron-sulfur 3 (3Fe-4S) By similarity
Binding sitei179 – 1791Ubiquinone; shared with DHSD By similarity
Metal bindingi221 – 2211Iron-sulfur 3 (3Fe-4S) By similarity
Metal bindingi227 – 2271Iron-sulfur 3 (3Fe-4S) By similarity
Metal bindingi231 – 2311Iron-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
OrganismiCyanidium caldarium
Taxonomic identifieri2771 [NCBI]
Taxonomic lineageiEukaryotaRhodophytaBangiophyceaeCyanidialesCyanidiaceaeCyanidium

Subcellular locationi

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 – 262262Succinate dehydrogenase [ubiquinone] iron-sulfur subunit
PRO_0000158695Add
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

ProteinModelPortaliP48933.
SMRiP48933. Positions 20-248.

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Domaini21 – 110902Fe-2S ferredoxin-type
Add
BLAST
Domaini154 – 184314Fe-4S ferredoxin-type
Add
BLAST

Sequence similaritiesi

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.

P48933-1 [UniParc]FASTAAdd to Basket

« Hide

MNLFSLKAEK FLNLKTLSDL KLIKIFRWDS SEKKDPWYST YVVSLKNCGP    50
IVLDALIKIK NECDSTVSFR RSCREGICGS CAININGTNS LACLQKLNIK 100
NNIIYVYPLP HIFVLKDLVV DLTNFYAQYR LIQPWLQSSL NIKSKKEIYQ 150
SKQDRLYLDG LYECILCACC SASCPSYWWN HDKYLGPAVL LQAYRWIVDS 200
RDDNTLSRLL SLKDSYKLYR CHTIMNCTKT CPKHLNPGKV IASIKKRLLN 250
LEVLGEKRDL NS 262
Length:262
Mass (Da):30,268
Last modified:February 1, 1996 - v1
Checksum:iD068EBCDB33B5580
GO

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
Z48930 Genomic DNA. Translation: CAA88766.1.
PIRiS62756.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
Z48930 Genomic DNA. Translation: CAA88766.1 .
PIRi S62756.

3D structure databases

ProteinModelPortali P48933.
SMRi P48933. Positions 20-248.
ModBasei Search...
MobiDBi Search...

Protocols and materials databases

Structural Biology Knowledgebase Search...

Enzyme and pathway databases

UniPathwayi UPA00223 ; UER01006 .

Family and domain databases

Gene3Di 3.10.20.30. 1 hit.
InterProi IPR001041. 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 ]
Pfami PF13085. Fer2_3. 1 hit.
[Graphical view ]
SUPFAMi SSF46548. SSF46548. 1 hit.
SSF54292. SSF54292. 1 hit.
TIGRFAMsi TIGR00384. dhsB. 1 hit.
PROSITEi PS00197. 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 ]
ProtoNeti Search...

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].
    Strain: RK-1.

Entry informationi

Entry nameiSDHB_CYACA
AccessioniPrimary (citable) accession number: P48933
Entry historyi
Integrated into UniProtKB/Swiss-Prot: February 1, 1996
Last sequence update: February 1, 1996
Last modified: June 11, 2014
This is version 88 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

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