Skip Header

You are using a version of browser that may not display all the features of this website. Please consider upgrading your browser.
Protein

Succinate dehydrogenase [ubiquinone] iron-sulfur subunit

Gene

SDH2

Organism
Reclinomonas americana
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:

Pathway: tricarboxylic acid cycle

This protein is involved in step 1 of the subpathway that synthesizes fumarate from succinate (eukaryal route).
Proteins known to be involved in this subpathway in this organism are:
  1. Succinate dehydrogenase [ubiquinone] iron-sulfur subunit (SDH2)
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)LengthDescriptionGraphical viewFeature identifierActions
Metal bindingi61 – 611Iron-sulfur 1 (2Fe-2S)By similarity
Metal bindingi66 – 661Iron-sulfur 1 (2Fe-2S)By similarity
Metal bindingi69 – 691Iron-sulfur 1 (2Fe-2S)By similarity
Metal bindingi81 – 811Iron-sulfur 1 (2Fe-2S)By similarity
Metal bindingi151 – 1511Iron-sulfur 2 (4Fe-4S)By similarity
Metal bindingi154 – 1541Iron-sulfur 2 (4Fe-4S)By similarity
Metal bindingi157 – 1571Iron-sulfur 2 (4Fe-4S)By similarity
Metal bindingi161 – 1611Iron-sulfur 3 (3Fe-4S)By similarity
Binding sitei166 – 1661Ubiquinone; shared with DHSDBy similarity
Metal bindingi208 – 2081Iron-sulfur 3 (3Fe-4S)By similarity
Metal bindingi214 – 2141Iron-sulfur 3 (3Fe-4S)By similarity
Metal bindingi218 – 2181Iron-sulfur 2 (4Fe-4S)By similarity

GO - Molecular functioni

GO - Biological processi

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
OrganismiReclinomonas americana
Taxonomic identifieri48483 [NCBI]
Taxonomic lineageiEukaryotaJakobidaHistionidaeReclinomonas

Subcellular locationi

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Membrane, Mitochondrion, Mitochondrion inner membrane

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 239239Succinate dehydrogenase [ubiquinone] iron-sulfur subunitPRO_0000158697Add
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

ProteinModelPortaliP80480.
SMRiP80480. Positions 7-233.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Domaini11 – 100902Fe-2S ferredoxin-typePROSITE-ProRule annotationAdd
BLAST
Domaini141 – 171314Fe-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

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.

P80480-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MNTKKEKIML FKVYRWNPDK KEKPHISTYS VDLNSCGPMV LDALIKIKNE
60 70 80 90 100
QDSTLTFRRS CREGVCGSCA MNIDGTNTLA CIKSIDTNKK EMKIYPLPHM
110 120 130 140 150
HIIKDLVPDL SNFYAQYKSI EPWMKTTEKK LDKEFYQSRN DREKLDGLYE
160 170 180 190 200
CVLCACCSTS CPSYWWNSDK YLGPAVLLQA YRWIVDSRDQ GTRERLQYLE
210 220 230
DPFKLYRCHT ILNCTKTCPK HLNPAQAIAK IKQNITLLT
Length:239
Mass (Da):27,828
Last modified:October 1, 1996 - v1
Checksum:i781C6FF0ED55375B
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF007261 Genomic DNA. Translation: AAD11913.1.
PIRiS78180.
RefSeqiNP_044798.1. NC_001823.1.

Genome annotation databases

GeneIDi801067.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF007261 Genomic DNA. Translation: AAD11913.1.
PIRiS78180.
RefSeqiNP_044798.1. NC_001823.1.

3D structure databases

ProteinModelPortaliP80480.
SMRiP80480. Positions 7-233.
ModBaseiSearch...
MobiDBiSearch...

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

GeneIDi801067.

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 encoding the same three subunits of respiratory complex II are present in the mitochondrial DNA of two phylogenetically distant eukaryotes."
    Burger G., Lang B.F., Reith M., Gray M.W.
    Proc. Natl. Acad. Sci. U.S.A. 93:2328-2332(1996) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].
    Strain: ATCC 50394.

Entry informationi

Entry nameiSDHB_RECAM
AccessioniPrimary (citable) accession number: P80480
Entry historyi
Integrated into UniProtKB/Swiss-Prot: October 1, 1996
Last sequence update: October 1, 1996
Last modified: January 7, 2015
This is version 91 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.