Reviewed, UniProtKB/Swiss-Prot P21914 (DHSB_DROME)

Names and origin

Protein names

Recommended name:
    Succinate dehydrogenase [ubiquinone] iron-sulfur subunit, mitochondrial
    EC=1.3.5.1
Alternative name(s):
    Iron-sulfur subunit of complex II
      Short name=Ip

Gene names

Name:	SdhB
Synonyms:	SDH
ORF Names:	CG3283

Organism

Drosophila melanogaster (Fruit fly) [Complete proteome]

Taxonomic identifier

7227 [NCBI]

Taxonomic lineage

Eukaryota › Metazoa › Arthropoda › Hexapoda › Insecta › Pterygota › Neoptera › Endopterygota › Diptera › Brachycera › Muscomorpha › Ephydroidea › Drosophilidae › Drosophila › Sophophora

Protein attributes

Sequence length	297 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is further processed into a mature form.
Protein existence	Evidence at transcript level.

General annotation (Comments)

Function	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 activity	Succinate + ubiquinone = fumarate + ubiquinol.
Cofactor	Binds 1 2Fe-2S cluster By similarity. Binds 1 3Fe-4S cluster By similarity. Binds 1 4Fe-4S cluster By similarity.
Pathway	Carbohydrate metabolism; tricarboxylic acid cycle; fumarate from succinate (eukaryal route): step 1/1.
Subunit structure	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.
Subcellular location	Mitochondrion inner membrane; Peripheral membrane protein; Matrix side By similarity.
Tissue specificity	Most abundant in the adult thorax and low in abdominal tissues. Ref.1
Developmental stage	Expressed throughout development; pupae have very low levels of expression, in contrast to larvae. Ref.1
Sequence similarities	Belongs to the succinate dehydrogenase/fumarate reductase iron-sulfur protein family. Contains 1 2Fe-2S ferredoxin-type domain. Contains 1 4Fe-4S ferredoxin-type domain.

Ontologies

Keywords
Biological process	Electron transport Transport Tricarboxylic acid cycle
Cellular component	Membrane Mitochondrion Mitochondrion inner membrane
Domain	Transit peptide
Ligand	2Fe-2S 3Fe-4S 4Fe-4S Iron Iron-sulfur Metal-binding
Molecular function	Oxidoreductase
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	mitochondrial electron transport, succinate to ubiquinone Inferred from direct assay. Source: FlyBase transport Inferred from electronic annotation. Source: UniProtKB-KW tricarboxylic acid cycle Inferred from electronic annotation. Source: UniProtKB-KW
Cellular component	extrinsic to membrane Inferred from electronic annotation. Source: UniProtKB-SubCell mitochondrial inner membrane Inferred from electronic annotation. Source: UniProtKB-KW
Molecular function	2 iron, 2 sulfur cluster binding Inferred from electronic annotation. Source: UniProtKB-KW 3 iron, 4 sulfur cluster binding Inferred from electronic annotation. Source: UniProtKB-KW 4 iron, 4 sulfur cluster binding Inferred from electronic annotation. Source: UniProtKB-KW electron carrier activity Inferred from electronic annotation. Source: InterPro iron ion binding Inferred from electronic annotation. Source: UniProtKB-KW succinate dehydrogenase (ubiquinone) activity Inferred from electronic annotation. Source: EC
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Transit peptide	1 – ?		Mitochondrion Potential
	Chain	? – 297		Succinate dehydrogenase [ubiquinone] iron-sulfur subunit, mitochondrial		PRO_0000010357
Regions
	Domain	47 – 140	94	2Fe-2S ferredoxin-type
	Domain	185 – 215	31	4Fe-4S ferredoxin-type
Sites
	Metal binding	100	1	Iron-sulfur 1 (2Fe-2S) By similarity
	Metal binding	105	1	Iron-sulfur 1 (2Fe-2S) By similarity
	Metal binding	108	1	Iron-sulfur 1 (2Fe-2S) By similarity
	Metal binding	120	1	Iron-sulfur 1 (2Fe-2S) By similarity
	Metal binding	195	1	Iron-sulfur 2 (4Fe-4S) By similarity
	Metal binding	198	1	Iron-sulfur 2 (4Fe-4S) By similarity
	Metal binding	201	1	Iron-sulfur 2 (4Fe-4S) By similarity
	Metal binding	205	1	Iron-sulfur 3 (3Fe-4S) By similarity
	Metal binding	252	1	Iron-sulfur 3 (3Fe-4S) By similarity
	Metal binding	258	1	Iron-sulfur 3 (3Fe-4S) By similarity
	Metal binding	262	1	Iron-sulfur 2 (4Fe-4S) By similarity
	Binding site	210	1	Ubiquinone; shared with DHSD By similarity

Sequences

	Sequence		Length	Mass (Da)
	P21914-1 [UniParc]. Last modified February 1, 1995. Version 2. Checksum: 892380E8BAE08FFF	FASTA	297	33,741
	10 20 30 40 50 60 MLATEARQIL SRVGSLVARN QMRAISNGTA QLEQQAQPKE AQEPQIKKFE IYRWNPDNAG 70 80 90 100 110 120 EKPYMQTYEV DLRECGPMVL DALIKIKNEM DPTLTFRRSC REGICGSCAM NIGGTNTLAC 130 140 150 160 170 180 ISKIDINTSK SLKVYPLPHM YVVRDLVPDM NNFYEQYRNI QPWLQRKNEA GEKKGKAQYL 190 200 210 220 230 240 QSVEDRSKLD GLYECILCAC CSTSCPSYWW NAEKYLGPAV LMQAYRWIID SRDENSAERL 250 260 270 280 290 NKLKDPFSVY RCHTIMNCTR TCPKGLNPGR AIAEIKKLLS GLASKPAPKL ETAALHK

References

	« Hide 'large scale' referencesShow 'large scale' references »
[1]	"Characterization of the gene encoding the iron-sulfur protein subunit of succinate dehydrogenase from Drosophila melanogaster." Au H.C., Scheffler I.E. Gene 149:261-265(1994) [PubMed: 7958999] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA], TISSUE SPECIFICITY, DEVELOPMENTAL STAGE.
[2]	"The genome sequence of Drosophila melanogaster." Adams M.D., Celniker S.E., Holt R.A., Evans C.A., Gocayne J.D., Amanatides P.G., Scherer S.E., Li P.W., Hoskins R.A., Galle R.F., George R.A., Lewis S.E., Richards S., Ashburner M., Henderson S.N., Sutton G.G., Wortman J.R., Yandell M.D. , Zhang Q., Chen L.X., Brandon R.C., Rogers Y.-H.C., Blazej R.G., Champe M., Pfeiffer B.D., Wan K.H., Doyle C., Baxter E.G., Helt G., Nelson C.R., Miklos G.L.G., Abril J.F., Agbayani A., An H.-J., Andrews-Pfannkoch C., Baldwin D., Ballew R.M., Basu A., Baxendale J., Bayraktaroglu L., Beasley E.M., Beeson K.Y., Benos P.V., Berman B.P., Bhandari D., Bolshakov S., Borkova D., Botchan M.R., Bouck J., Brokstein P., Brottier P., Burtis K.C., Busam D.A., Butler H., Cadieu E., Center A., Chandra I., Cherry J.M., Cawley S., Dahlke C., Davenport L.B., Davies P., de Pablos B., Delcher A., Deng Z., Mays A.D., Dew I., Dietz S.M., Dodson K., Doup L.E., Downes M., Dugan-Rocha S., Dunkov B.C., Dunn P., Durbin K.J., Evangelista C.C., Ferraz C., Ferriera S., Fleischmann W., Fosler C., Gabrielian A.E., Garg N.S., Gelbart W.M., Glasser K., Glodek A., Gong F., Gorrell J.H., Gu Z., Guan P., Harris M., Harris N.L., Harvey D.A., Heiman T.J., Hernandez J.R., Houck J., Hostin D., Houston K.A., Howland T.J., Wei M.-H., Ibegwam C., Jalali M., Kalush F., Karpen G.H., Ke Z., Kennison J.A., Ketchum K.A., Kimmel B.E., Kodira C.D., Kraft C.L., Kravitz S., Kulp D., Lai Z., Lasko P., Lei Y., Levitsky A.A., Li J.H., Li Z., Liang Y., Lin X., Liu X., Mattei B., McIntosh T.C., McLeod M.P., McPherson D., Merkulov G., Milshina N.V., Mobarry C., Morris J., Moshrefi A., Mount S.M., Moy M., Murphy B., Murphy L., Muzny D.M., Nelson D.L., Nelson D.R., Nelson K.A., Nixon K., Nusskern D.R., Pacleb J.M., Palazzolo M., Pittman G.S., Pan S., Pollard J., Puri V., Reese M.G., Reinert K., Remington K., Saunders R.D.C., Scheeler F., Shen H., Shue B.C., Siden-Kiamos I., Simpson M., Skupski M.P., Smith T.J., Spier E., Spradling A.C., Stapleton M., Strong R., Sun E., Svirskas R., Tector C., Turner R., Venter E., Wang A.H., Wang X., Wang Z.-Y., Wassarman D.A., Weinstock G.M., Weissenbach J., Williams S.M., Woodage T., Worley K.C., Wu D., Yang S., Yao Q.A., Ye J., Yeh R.-F., Zaveri J.S., Zhan M., Zhang G., Zhao Q., Zheng L., Zheng X.H., Zhong F.N., Zhong W., Zhou X., Zhu S.C., Zhu X., Smith H.O., Gibbs R.A., Myers E.W., Rubin G.M., Venter J.C. Science 287:2185-2195(2000) [PubMed: 10731132] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: Berkeley.
[3]	"Annotation of the Drosophila melanogaster euchromatic genome: a systematic review." Misra S., Crosby M.A., Mungall C.J., Matthews B.B., Campbell K.S., Hradecky P., Huang Y., Kaminker J.S., Millburn G.H., Prochnik S.E., Smith C.D., Tupy J.L., Whitfield E.J., Bayraktaroglu L., Berman B.P., Bettencourt B.R., Celniker S.E., de Grey A.D.N.J. , Drysdale R.A., Harris N.L., Richter J., Russo S., Schroeder A.J., Shu S.Q., Stapleton M., Yamada C., Ashburner M., Gelbart W.M., Rubin G.M., Lewis S.E. Genome Biol. 3:RESEARCH0083.1-RESEARCH0083.22(2002) [PubMed: 12537572] [Abstract] Cited for: GENOME REANNOTATION.
[4]	"A Drosophila full-length cDNA resource." Stapleton M., Carlson J.W., Brokstein P., Yu C., Champe M., George R.A., Guarin H., Kronmiller B., Pacleb J.M., Park S., Wan K.H., Rubin G.M., Celniker S.E. Genome Biol. 3:RESEARCH0080.1-RESEARCH0080.8(2002) [PubMed: 12537569] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA]. Strain: Berkeley. Tissue: Embryo.
[5]	"Use of the DNA polymerase chain reaction for homology probing: isolation of partial cDNA or genomic clones encoding the iron-sulfur protein of succinate dehydrogenase from several species." Gould S.J., Subramani S., Scheffler I.E. Proc. Natl. Acad. Sci. U.S.A. 86:1934-1938(1989) [PubMed: 2494655] [Abstract] Cited for: PRELIMINARY NUCLEOTIDE SEQUENCE OF 113-258.
[6]	Erratum Gould S.J., Subramani S., Scheffler I.E. Proc. Natl. Acad. Sci. U.S.A. 90:2556-2556(1993)
+	Additional computationally mapped references.

Cross-references

Sequence databases
EMBL GenBank DDBJ	L27705 Genomic DNA. Translation: AAA61925.1. AE013599 Genomic DNA. Translation: AAF57396.1. AY118923 mRNA. Translation: AAM50783.1.
RefSeq	NP_477101.1.
UniGene	Dm.497
3D structure databases
SMR	P21914. Positions 41-280.
ModBase	Search...
Protein-protein interaction databases
DIP	DIP-20115N.
IntAct	P21914. 15 interactions.
STRING	P21914.
Genome annotation databases
Ensembl	FBtr0086156; FBpp0085489; FBgn0014028; Drosophila melanogaster. [Genome view]
GeneID	35590.
KEGG	dme:Dmel_CG3283.
NMPDR	fig|7227.3.peg.3517.
Organism-specific databases
CTD	35590.
FlyBase	FBgn0014028. SdhB.
Phylogenomic databases
eggNOG	inNOG04044.
InParanoid	P21914.
OMA	PTISFRR.
OrthoDB	EOG969R1W.
PhylomeDB	P21914.
Enzyme and pathway databases
BioCyc	DMEL-XXX-02:DMEL-XXX-02-003098-MONOMER.
BRENDA	1.3.5.1. 48.
Gene expression databases
ArrayExpress	P21914.
GermOnline	CG3283. Drosophila melanogaster.
Family and domain databases
InterPro	IPR006058. 2Fe2S_fd_BS. IPR017896. 4Fe4S_Fe-S-bd. IPR017900. 4Fe4S_Fe_S_CS. IPR012675. b-grasp_ferredoxin-like. IPR001041. Ferredoxin. IPR012285. Fum_reductase_C. IPR009051. Helical_ferredxn. IPR004489. Succ_DH/fum_Rdtase_Fe-S. [Graphical view]
Gene3D	G3DSA:3.10.20.30. Ferredoxin_fold. 1 hit. G3DSA:1.10.1060.10. Fum_reductase_C. 1 hit.
TIGRFAMs	TIGR00384. dhsB. 1 hit.
PROSITE	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]
ProtoNet	Search...
Other Resources
NextBio	794181.

Entry information

Entry name

DHSB_DROME

Accession

Primary (citable) accession number: P21914
Secondary accession number(s): Q9V9A0

Entry history

Integrated into UniProtKB/Swiss-Prot:	May 1, 1991
Last sequence update:	February 1, 1995
Last modified:	February 9, 2010
This is version 106 of the entry and version 2 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

Drosophila annotation project