UniProtKB - P00157 (CYB_BOVIN)

BLAST

>sp|P00157|CYB_BOVIN Cytochrome b OS=Bos taurus OX=9913 GN=MT-CYB PE=1 SV=1
MTNIRKSHPLMKIVNNAFIDLPAPSNISSWWNFGSLLGICLILQILTGLFLAMHYTSDTT
TAFSSVTHICRDVNYGWIIRYMHANGASMFFICLYMHVGRGLYYGSYTFLETWNIGVILL
LTVMATAFMGYVLPWGQMSFWGATVITNLLSAIPYIGTNLVEWIWGGFSVDKATLTRFFA
FHFILPFIIMAIAMVHLLFLHETGSNNPTGISSDVDKIPFHPYYTIKDILGALLLILALM
LLVLFAPDLLGDPDNYTPANPLNTPPHIKPEWYFLFAYAILRSIPNKLGGVLALAFSILI
LALIPLLHTSKQRSMMFRPLSQCLFWALVADLLTLTWIGGQPVEHPYITIGQLASVLYFL
LILVLMPTAGTIENKLLKW

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History
Entry version 149 (12 Sep 2018)
Sequence version 1 (21 Jul 1986)
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Protein

Cytochrome b

Gene

MT-CYB

Organism

Bos taurus (Bovine)

Status

Reviewed-Annotation score: -Experimental evidence at protein levelⁱ

Functionⁱ

Component of the ubiquinol-cytochrome c reductase complex (complex III or cytochrome b-c1 complex) that is part of the mitochondrial respiratory chain. The b-c1 complex mediates electron transfer from ubiquinol to cytochrome c. Contributes to the generation of a proton gradient across the mitochondrial membrane that is then used for ATP synthesis.1 Publication3 Publications

Miscellaneous

Heme 1 (or BL or b562) is low-potential and absorbs at about 562 nm, and heme 2 (or BH or b566) is high-potential and absorbs at about 566 nm.

Caution

The full-length protein contains only eight transmembrane helices, not nine as predicted by bioinformatics tools.6 Publications

Cofactorⁱ

heme6 PublicationsNote: Binds 2 heme groups non-covalently.6 Publications

Sites

Feature key	Position(s)	DescriptionActions	Length
Metal bindingⁱ	83	Iron 1 (heme b562 axial ligand)PROSITE-ProRule annotationCombined sources6 Publications	1
Metal bindingⁱ	97	Iron 2 (heme b566 axial ligand)Combined sources6 Publications	1
Metal bindingⁱ	182	Iron 1 (heme b562 axial ligand)Combined sources6 Publications	1
Metal bindingⁱ	196	Iron 2 (heme b566 axial ligand)Combined sources6 Publications	1
Binding siteⁱ	201	UbiquinoneCombined sources2 Publications	1

GO - Molecular functionⁱ

heme binding
Source: UniProtKB
Inferred from direct assayⁱ
- 15312779
metal ion binding Source: UniProtKB-KW
ubiquinol-cytochrome-c reductase activity
Source: UniProtKB
Inferred from direct assayⁱ
- 1327781
ubiquinone binding
Source: UniProtKB
Inferred from direct assayⁱ
- 15312779

View the complete GO annotation on QuickGO ...

GO - Biological processⁱ

mitochondrial electron transport, ubiquinol to cytochrome c
Source: UniProtKB
Inferred from direct assayⁱ
- 1327781
respiratory electron transport chain
Source: UniProtKB
Inferred from direct assayⁱ
- 1327781

View the complete GO annotation on QuickGO ...

Keywordsⁱ

Biological process	Electron transport, Respiratory chain, Transport
Ligand	Heme, Iron, Metal-binding, Ubiquinone

Enzyme and pathway databases

Reactomeⁱ	R-BTA-611105 Respiratory electron transport

Reactomeⁱ

R-BTA-611105 Respiratory electron transport

Protein family/group databases

TCDBⁱ	3.D.3.2.1 the proton-translocating quinol:cytochrome c reductase (qcr) superfamily

TCDBⁱ

3.D.3.2.1 the proton-translocating quinol:cytochrome c reductase (qcr) superfamily

Names & Taxonomyⁱ

Protein namesⁱ	Recommended name: Cytochrome b Alternative name(s): Complex III subunit 3 Complex III subunit III Cytochrome b-c1 complex subunit 3 Ubiquinol-cytochrome-c reductase complex cytochrome b subunit
Gene namesⁱ	Name:MT-CYB Synonyms:COB, CYTB, MTCYB
Encoded onⁱ	Mitochondrion
Organismⁱ	Bos taurus (Bovine)
Taxonomic identifierⁱ	9913 [NCBI]
Taxonomic lineageⁱ	cellular organisms › Eukaryota › Opisthokonta › Metazoa › Eumetazoa › Bilateria › Deuterostomia › Chordata › Craniata › Vertebrata › Gnathostomata › Teleostomi › Euteleostomi › Sarcopterygii › Dipnotetrapodomorpha › Tetrapoda › Amniota › Mammalia › Theria › Eutheria › Boreoeutheria › Laurasiatheria › Cetartiodactyla › Ruminantia › Pecora › Bovidae › Bovinae › Bos
Proteomesⁱ	UP000009136 Componentⁱ: Mitochondrion

Organism-specific databases

VGNCⁱ	VGNC:55738 MT-CYB

VGNCⁱ

VGNC:55738 MT-CYB

Topology

Feature key	Position(s)	DescriptionActions	Length
Transmembraneⁱ	33 – 53	HelicalCombined sourcesAdd BLAST	21
Transmembraneⁱ	77 – 98	HelicalCombined sourcesAdd BLAST	22
Transmembraneⁱ	113 – 133	HelicalCombined sourcesAdd BLAST	21
Transmembraneⁱ	178 – 198	HelicalCombined sourcesAdd BLAST	21
Transmembraneⁱ	226 – 246	HelicalCombined sourcesAdd BLAST	21
Transmembraneⁱ	288 – 308	HelicalCombined sourcesAdd BLAST	21
Transmembraneⁱ	320 – 340	HelicalCombined sourcesAdd BLAST	21
Transmembraneⁱ	347 – 367	HelicalCombined sourcesAdd BLAST	21

Keywords - Cellular componentⁱ

Membrane, Mitochondrion, Mitochondrion inner membrane

PTM / Processingⁱ

Molecule processing

Feature key	Position(s)	DescriptionActions	Graphical view	Length
ChainⁱPRO_0000060686	1 – 379	Cytochrome bAdd BLAST		379

Proteomic databases

PaxDbⁱ	P00157
PRIDEⁱ	P00157

Expressionⁱ

Tissue specificityⁱ

Detected in heart (at protein level).3 Publications

Gene expression databases

Bgeeⁱ	ENSBTAG00000043550 Expressed in 9 organ(s), highest expression level in prefrontal cortex
ExpressionAtlasⁱ	P00157 baseline

Interactionⁱ

Subunit structureⁱ

The cytochrome bc1 complex contains 11 subunits: 3 respiratory subunits (MT-CYB, CYC1 and UQCRFS1), 2 core proteins (UQCRC1 and UQCRC2) and 6 low-molecular weight proteins (UQCRH/QCR6, UQCRB/QCR7, UQCRQ/QCR8, UQCR10/QCR9, UQCR11/QCR10 and a cleavage product of UQCRFS1). This cytochrome bc1 complex then forms a dimer.1 Publication6 Publications

Protein-protein interaction databases

CORUMⁱ	P00157
Database of interacting proteins More...DIPⁱ	DIP-350N
IntActⁱ	P00157, 2 interactors
STRINGⁱ	9913.ENSBTAP00000053148

Structureⁱ

Secondary structure

Legend: HelixTurnBeta strandPDB Structure known for this area

Feature key	Position(s)	DescriptionActions	Length
Helixⁱ	4 – 7	Combined sources	4
Helixⁱ	9 – 18	Combined sources	10
Beta strandⁱ	22 – 24	Combined sources	3
Helixⁱ	29 – 31	Combined sources	3
Helixⁱ	33 – 52	Combined sources	20
Turnⁱ	59 – 61	Combined sources	3
Helixⁱ	62 – 72	Combined sources	11
Beta strandⁱ	73 – 75	Combined sources	3
Helixⁱ	76 – 103	Combined sources	28
Helixⁱ	106 – 108	Combined sources	3
Helixⁱ	110 – 132	Combined sources	23
Helixⁱ	137 – 147	Combined sources	11
Helixⁱ	148 – 152	Combined sources	5
Turnⁱ	154 – 156	Combined sources	3
Helixⁱ	157 – 165	Combined sources	9
Beta strandⁱ	167 – 170	Combined sources	4
Helixⁱ	172 – 203	Combined sources	32
Helixⁱ	214 – 216	Combined sources	3
Beta strandⁱ	217 – 219	Combined sources	3
Helixⁱ	220 – 245	Combined sources	26
Turnⁱ	247 – 250	Combined sources	4
Helixⁱ	253 – 256	Combined sources	4
Turnⁱ	261 – 263	Combined sources	3
Helixⁱ	272 – 274	Combined sources	3
Helixⁱ	275 – 282	Combined sources	8
Beta strandⁱ	284 – 286	Combined sources	3
Helixⁱ	287 – 299	Combined sources	13
Helixⁱ	300 – 307	Combined sources	8
Beta strandⁱ	311 – 315	Combined sources	5
Helixⁱ	319 – 339	Combined sources	21
Helixⁱ	347 – 363	Combined sources	17
Helixⁱ	365 – 376	Combined sources	12

Show more details

3D structure databases

ProteinModelPortalⁱ	P00157
SMRⁱ	P00157
ModBaseⁱ	Search...
MobiDBⁱ	Search...

Miscellaneous databases

EvolutionaryTraceⁱ

P00157

Family & Domainsⁱ

Sequence similaritiesⁱ

Belongs to the cytochrome b family.PROSITE-ProRule annotation

Keywords - Domainⁱ

Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGⁱ	KOG4663 Eukaryota COG1290 LUCA
Ensembl GeneTree More...GeneTreeⁱ	ENSGT00390000017948
HOGENOMⁱ	HOG000255206
HOVERGENⁱ	HBG017694
InParanoidⁱ	P00157
KEGG Orthology (KO) More...KOⁱ	K00412
OMAⁱ	HETGSNN
Database of Orthologous Groups More...OrthoDBⁱ	EOG091G0DW4
TreeFamⁱ	TF353088

Family and domain databases

Conserved Domains Database More...CDDⁱ	cd00290 cytochrome_b_C, 1 hit cd00284 Cytochrome_b_N, 1 hit
Gene3Dⁱ	1.20.810.10, 1 hit
InterProⁱ	View protein in InterPro IPR005798 Cyt_b/b6_C IPR036150 Cyt_b/b6_C_sf IPR005797 Cyt_b/b6_N IPR027387 Cytb/b6-like_sf IPR030689 Cytochrome_b IPR016174 Di-haem_cyt_TM
Pfam protein domain database More...Pfamⁱ	View protein in Pfam PF00032 Cytochrom_B_C, 1 hit PF00033 Cytochrome_B, 1 hit
PIRSFⁱ	PIRSF038885 COB, 1 hit
SUPFAMⁱ	SSF81342 SSF81342, 1 hit SSF81648 SSF81648, 1 hit
PROSITEⁱ	View protein in PROSITE PS51003 CYTB_CTER, 1 hit PS51002 CYTB_NTER, 1 hit

Sequenceⁱ

Sequence statusⁱ: Complete.

P00157-1 [UniParc]FASTA Add to basket

« Hide

        10         20         30         40         50
MTNIRKSHPL MKIVNNAFID LPAPSNISSW WNFGSLLGIC LILQILTGLF 
        60         70         80         90        100
LAMHYTSDTT TAFSSVTHIC RDVNYGWIIR YMHANGASMF FICLYMHVGR 
       110        120        130        140        150
GLYYGSYTFL ETWNIGVILL LTVMATAFMG YVLPWGQMSF WGATVITNLL 
       160        170        180        190        200
SAIPYIGTNL VEWIWGGFSV DKATLTRFFA FHFILPFIIM AIAMVHLLFL 
       210        220        230        240        250
HETGSNNPTG ISSDVDKIPF HPYYTIKDIL GALLLILALM LLVLFAPDLL 
       260        270        280        290        300
GDPDNYTPAN PLNTPPHIKP EWYFLFAYAI LRSIPNKLGG VLALAFSILI 
       310        320        330        340        350
LALIPLLHTS KQRSMMFRPL SQCLFWALVA DLLTLTWIGG QPVEHPYITI 
       360        370 
GQLASVLYFL LILVLMPTAG TIENKLLKW

Length:379

Mass (Da):42,591

Last modified:July 21, 1986 - v1

Checksum:ⁱ90160B99E031E016

Natural variant

Feature key	Position(s)	DescriptionActions	Graphical view	Length
Natural variantⁱ	90	F → V in strain: 65, 66 and D.		1

Sequence databases

Select the link destinations: EMBLⁱ GenBankⁱ DDBJⁱ Links Updated	V00654 Genomic DNA Translation: CAA24007.1 AF490528 Genomic DNA Translation: AAM08329.1 AF490529 Genomic DNA Translation: AAM08342.1 AF493541 Genomic DNA Translation: AAM12801.1 AF493542 Genomic DNA Translation: AAM12814.1
PIRⁱ	A00152 CBBO
NCBI Reference Sequences More...RefSeqⁱ	YP_209217.1, NC_006853.1

Genome annotation databases

Ensemblⁱ	ENSBTAT00000060567; ENSBTAP00000053148; ENSBTAG00000043550
GeneIDⁱ	3283889
KEGGⁱ	bta:3283889

Similar proteinsⁱ

100% Identity
90% Identity
50% Identity

Protein	Similar proteins		Species	Score	Length	Source
P00157	Cytochrome b		BOVIN		379	UniRef100_P00157
Cytochrome b		BOSGF		379
Cytochrome b		BOSJA		379
Cytochrome b		BOSIN		379
Cytochrome b (Fragment)		BOVIN		133
+4

Protein	Similar proteins		Species	Score	Length	Source
P00157	Cytochrome b		CAPSI		380	UniRef90_P00157
Cytochrome b		RUPPY		380
Cytochrome b		RUPRU		380
Cytochrome b		SAITA		380
Cytochrome b		ADDNA		379
+2352

Protein	Similar proteins		Species	Score	Length	Source
P00157	Cytochrome b	)	HUMAN		380	UniRef50_P00156
Cytochrome b		GORGO		380
Cytochrome b		PANPA		380
Cytochrome b		PANTR		380
Cytochrome b		LIPVE		379
+105962

Cross-referencesⁱ

Sequence databases

Select the link destinations: EMBLⁱ GenBankⁱ DDBJⁱ Links Updated	V00654 Genomic DNA Translation: CAA24007.1 AF490528 Genomic DNA Translation: AAM08329.1 AF490529 Genomic DNA Translation: AAM08342.1 AF493541 Genomic DNA Translation: AAM12801.1 AF493542 Genomic DNA Translation: AAM12814.1
PIRⁱ	A00152 CBBO
RefSeqⁱ	YP_209217.1, NC_006853.1

3D structure databases

Select the link destinations: Protein Data Bank Europe More...PDBeⁱ Protein Data Bank RCSB More...RCSB PDBⁱ Protein Data Bank Japan More...PDBjⁱ Links Updated	PDB entry	Method	Resolution (Å)	Chain	Positions	PDBsum
	1BE3	X-ray	3.00	C	1-379	[»]
	1BGY	X-ray	3.00	C/O	1-379	[»]
	1L0L	X-ray	2.35	C	1-379	[»]
	1L0N	X-ray	2.60	C	1-379	[»]
	1NTK	X-ray	2.60	C	1-379	[»]
	1NTM	X-ray	2.40	C	1-379	[»]
	1NTZ	X-ray	2.60	C	1-379	[»]
	1NU1	X-ray	3.20	C	1-379	[»]
	1PP9	X-ray	2.10	C/P	1-379	[»]
	1PPJ	X-ray	2.10	C/P	1-379	[»]
	1QCR	X-ray	2.70	C	2-379	[»]
	1SQB	X-ray	2.69	C	1-379	[»]
	1SQP	X-ray	2.70	C	1-379	[»]
	1SQQ	X-ray	3.00	C	1-379	[»]
	1SQV	X-ray	2.85	C	1-379	[»]
	1SQX	X-ray	2.60	C	1-379	[»]
	2A06	X-ray	2.10	C/P	1-379	[»]
	2FYU	X-ray	2.26	C	1-379	[»]
	2YBB	electron microscopy	19.00	C/c	1-379	[»]
	4D6T	X-ray	3.57	C/P	1-379	[»]
	4D6U	X-ray	4.09	C/P	1-379	[»]
	5GPN	electron microscopy	5.40	C/O	1-379	[»]
	5KLV	X-ray	2.65	C	1-379	[»]
	5LUF	electron microscopy	9.10	b/o	1-379	[»]
	5NMI	X-ray	3.50	C/P	8-379	[»]
	5OKD	X-ray	3.10	C	1-379	[»]
	6FO0	electron microscopy	4.10	C/P	1-379	[»]
	6FO2	electron microscopy	4.40	C/P	1-379	[»]
	6FO6	electron microscopy	4.10	C/P	1-379	[»]
ProteinModelPortalⁱ	P00157
SMRⁱ	P00157
ModBaseⁱ	Search...
MobiDBⁱ	Search...

Protein-protein interaction databases

CORUMⁱ	P00157
DIPⁱ	DIP-350N
IntActⁱ	P00157, 2 interactors
STRINGⁱ	9913.ENSBTAP00000053148

Protein family/group databases

TCDBⁱ	3.D.3.2.1 the proton-translocating quinol:cytochrome c reductase (qcr) superfamily

TCDBⁱ

3.D.3.2.1 the proton-translocating quinol:cytochrome c reductase (qcr) superfamily

Proteomic databases

PaxDbⁱ	P00157
PRIDEⁱ	P00157

Protocols and materials databases

Structural Biology Knowledgebase	Search...

Structural Biology Knowledgebase

Search...

Genome annotation databases

Ensemblⁱ	ENSBTAT00000060567; ENSBTAP00000053148; ENSBTAG00000043550
GeneIDⁱ	3283889
KEGGⁱ	bta:3283889

Organism-specific databases

CTDⁱ	4519
VGNCⁱ	VGNC:55738 MT-CYB

Phylogenomic databases

eggNOGⁱ	KOG4663 Eukaryota COG1290 LUCA
GeneTreeⁱ	ENSGT00390000017948
HOGENOMⁱ	HOG000255206
HOVERGENⁱ	HBG017694
InParanoidⁱ	P00157
KOⁱ	K00412
OMAⁱ	HETGSNN
OrthoDBⁱ	EOG091G0DW4
TreeFamⁱ	TF353088

Enzyme and pathway databases

Reactomeⁱ	R-BTA-611105 Respiratory electron transport

Reactomeⁱ

R-BTA-611105 Respiratory electron transport

Miscellaneous databases

EvolutionaryTraceⁱ	P00157
Protein Ontology More...PROⁱ	PR:P00157

Gene expression databases

Bgeeⁱ	ENSBTAG00000043550 Expressed in 9 organ(s), highest expression level in prefrontal cortex
ExpressionAtlasⁱ	P00157 baseline

Family and domain databases

CDDⁱ	cd00290 cytochrome_b_C, 1 hit cd00284 Cytochrome_b_N, 1 hit
Gene3Dⁱ	1.20.810.10, 1 hit
InterProⁱ	View protein in InterPro IPR005798 Cyt_b/b6_C IPR036150 Cyt_b/b6_C_sf IPR005797 Cyt_b/b6_N IPR027387 Cytb/b6-like_sf IPR030689 Cytochrome_b IPR016174 Di-haem_cyt_TM
Pfamⁱ	View protein in Pfam PF00032 Cytochrom_B_C, 1 hit PF00033 Cytochrome_B, 1 hit
PIRSFⁱ	PIRSF038885 COB, 1 hit
SUPFAMⁱ	SSF81342 SSF81342, 1 hit SSF81648 SSF81648, 1 hit
PROSITEⁱ	View protein in PROSITE PS51003 CYTB_CTER, 1 hit PS51002 CYTB_NTER, 1 hit
ProtoNetⁱ	Search...

Entry informationⁱ

Entry nameⁱ	CYB_BOVIN
Accessionⁱ	P00157Primary (citable) accession number: P00157 Secondary accession number(s): Q8SE06
Entry historyⁱ	Integrated into UniProtKB/Swiss-Prot:	July 21, 1986
	Last sequence update:	July 21, 1986
	Last modified:	September 12, 2018
	This is version 149 of the entry and version 1 of the sequence. See complete history.
Entry statusⁱ	Reviewed (UniProtKB/Swiss-Prot)
Annotation program	Chordata Protein Annotation Program

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Supporting data

UniProtKB - P00157 (CYB_BOVIN)

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Cytochrome b

MT-CYB

Select a section on the left to see content.

<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

Miscellaneous

Caution

Sites

<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

Enzyme and pathway databases

Protein family/group databases

<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

Organism-specific databases

<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

Mitochondrion

Mitochondrion

Other locations

Topology

Keywords - Cellular componenti

<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

Proteomic databases

<p>This section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms.<p><a href='/help/expression_section' target='_top'>More...</a></p>Expressioni

Gene expression databases

<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

Protein-protein interaction databases

<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

Secondary structure

3D structure databases

Miscellaneous databases

<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

Phylogenomic databases

Family and domain databases

Natural variant

Sequence databases

Genome annotation databases

<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

3D structure databases

Protein-protein interaction databases

Protein family/group databases

Proteomic databases

Protocols and materials databases

Genome annotation databases

Organism-specific databases

Phylogenomic databases

Enzyme and pathway databases

Miscellaneous databases

Gene expression databases

Family and domain databases

<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 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

Documents

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Functionⁱ

GO - Molecular functionⁱ

GO - Biological processⁱ

Names & Taxonomyⁱ

Subcellular locationⁱ

Keywords - Cellular componentⁱ

PTM / Processingⁱ

Expressionⁱ

Interactionⁱ

Structureⁱ

Family & Domainsⁱ

Sequence similaritiesⁱ

Keywords - Domainⁱ

Cross-referencesⁱ

Entry informationⁱ

Miscellaneousⁱ

Keywords - Technical termⁱ