1ezv

STRUCTURE OF THE YEAST CYTOCHROME BC1 COMPLEX CO-CRYSTALLIZED WITH AN ANTIBODY FV-FRAGMENT

Method: X-RAY DIFFRACTION

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1. Protein Identity and Related Structures Protein Identity & Related Structures

UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX CORE PROTEIN I

Saccharomyces cerevisiae

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 20	UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX CORE PROTEIN 2 × 2 CYTOCHROME B × 2 CYTOCHROME C1 × 2 UBIQUINOL-CYTOCHROME C REDUCTASE IRON-SULFUR SUBUNIT × 2 UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX 17 KD PROTEIN × 2 UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX 14 KD PROTEIN × 2 UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX UBIQUINONE-BINDING PROTEIN QP-C × 2 UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX 7.3 KD PROTEIN × 2 （P22289） HEAVY CHAIN (VH) OF FV-FRAGMENT × 1 LIGHT CHAIN (VL) OF FV-FRAGMENT × 1 PROTOPORPHYRIN IX CONTAINING FE × 4 STIGMATELLIN A × 2 5-(3,7,11,15,19,23-HEXAMETHYL-TETRACOSA-2,6,10,14,18,22-HEXAENYL)-2,3-DIMETHOXY-6-METHYL-BENZENE-1,4-DIOL × 2 HEME C × 2 FE2/S2 (INORGANIC) CLUSTER × 2 water × 20	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	UQCR1_YEAST
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–430； UniProt 27–457

UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX 7.3 KD PROTEIN

Saccharomyces cerevisiae

UniProt P22289

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 20	UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX CORE PROTEIN I × 2 （P07256） UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX CORE PROTEIN 2 × 2 CYTOCHROME B × 2 CYTOCHROME C1 × 2 UBIQUINOL-CYTOCHROME C REDUCTASE IRON-SULFUR SUBUNIT × 2 UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX 17 KD PROTEIN × 2 UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX 14 KD PROTEIN × 2 UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX UBIQUINONE-BINDING PROTEIN QP-C × 2 HEAVY CHAIN (VH) OF FV-FRAGMENT × 1 LIGHT CHAIN (VL) OF FV-FRAGMENT × 1 PROTOPORPHYRIN IX CONTAINING FE × 4 STIGMATELLIN A × 2 5-(3,7,11,15,19,23-HEXAMETHYL-TETRACOSA-2,6,10,14,18,22-HEXAENYL)-2,3-DIMETHOXY-6-METHYL-BENZENE-1,4-DIOL × 2 HEME C × 2 FE2/S2 (INORGANIC) CLUSTER × 2 water × 20	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	UCR9_YEAST
Isoform	—
PDB entities	9
Chains and sequence ranges	Author chain I； PDBConstruct 1–55； UniProt 4–58

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	1ezv
Deposition date deposition_date	2000-05-12
Structure title title	STRUCTURE OF THE YEAST CYTOCHROME BC1 COMPLEX CO-CRYSTALLIZED WITH AN ANTIBODY FV-FRAGMENT
Keywords keywords	;cytochrome bc1 complex, complex III, QCR, mitochondria, yeast, antibody Fv-fragment, stigmatellin, coenzyme Q6, matrix processing peptidases, ubiquinone, electron transfer, proton transfer, Q-cycle, OXIDOREDUCTASE-ELECTRON TRANSPORT COMPLEX ;; OXIDOREDUCTASE/ELECTRON TRANSPORT
Experimental Method method	X-RAY DIFFRACTION

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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

1ezv__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

1ezv__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1ezv__assembly_1__model_1 | P(r) · Pending

P(r) will be calculated and displayed separately for the same assembly/model.

Rg（Guinier）	57.14 Å
Rg (electron density)	56.29 Å
Total Rg	56.42 Å
Atom count	33013
Residues	4122
Excluded volume	591600 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1ezv__assembly_1__model_1`	eicosameric （20）	Success	4.1.3-1-20251215 (887e7ef)	View Download

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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (17)

Entity 1 Entity 1 polymer

Description description	UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX CORE PROTEIN I
Molecular weight formula_weight	47358.2 kDa
EC 编号 ec_number	1.10.2.2
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	17781

AEVTQLSNGIVVATEHNPAHTASVGVVFGSGAANENPYNNGVSNLWKNIFLSKENSAVAAKEGLALSSNISRDFQSYIVSSLPGSTDKSLDFLNQSFIQQKANLLSSSNFEATKKSVLKQVQDFEDNDHPNRVLEHLHSTAFQNTPLSLPTRGTLESLENLVVADLESFANNHFLNSNAVVVGTGNIKHEDLVNSIESKNLSLQTGTKPVLKKKAAFLGSEVRLRDDTLPKAWISLAVEGEPVNSPNYFVAKLAAQIFGSYNAFEPASRLQGIKLLDNIQEYQLCDNFNHFSLSYKDSGLWGFSTATRNVTMIDDLIHFTLKQWNRLTISVTDTEVERAKSLLKLQLGQLYESGNPVNDANLLGAEVLIKGSKLSLGEAFKKIDAITVKDVKAWAGKRLWDQDIAIAGTGQIEGLLDYMRIRSDMSMMRW

Source Source

Source organism organism	Saccharomyces cerevisiae
Common name common_name	;baker's yeast ;
NCBI taxonomy ID ncbi_taxonomy_id	4932

Entity 2 Entity 2 polymer

Description description	UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX CORE PROTEIN 2
Molecular weight formula_weight	38751.9 kDa
EC 编号 ec_number	1.10.2.2
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B

LTVSARDAPTKISTLAVKVHGGSRYATKDGVAHLLNRFNFQNTNTRSALKLVRESELLGGTFKSTLDREYITLKATFLKDDLPYYVNALADVLYKTAFKPHELTESVLPAARYDYAVAEQCPVKSAEDQLYAITFRKGLGNPLLYDGVERVSLQDIKDFADKVYTKENLEVSGENVVEADLKRFVDESLLSTLPAGKSLVSKSEPKFFLGEENRVRFIGDSVAAIGIPVNKASLAQYEVLANYLTSALSELSGLISSAKLDKFTDGGLFTLFVRDQDSAVVSSNIKKIVADLKKGKDLSPAINYTKLKNAVQNESVSSPIELNFDAVKDFKLGKFNYVAVGDVSNLPYLDEL

Source Source

Source organism organism	Saccharomyces cerevisiae
Common name common_name	;baker's yeast ;
NCBI taxonomy ID ncbi_taxonomy_id	4932

Entity 3 Entity 3 polymer

Description description	CYTOCHROME B
Molecular weight formula_weight	43674.5 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C

MAFRKSNVYLSLVNSYIIDSPQPSSINYWWNMGSLLGLCLVIQIVTGIFMAMHYSSNIELAFSSVEHIMRDVHNGYILRYLHANGASFFFMVMFMHMAKGLYYGSYRSPRVTLWNVGVIIFTLTIATAFLGYCCVYGQMSHWGATVITNLFSAIPFVGNDIVSWLWGGFSVSNPTIQRFFALHYLVPFIIAAMVIMHLMALHIHGSSNPLGITGNLDRIPMHSYFIFKDLVTVFLFMLILALFVFYSPNTLGHPDNYIPGNPLVTPASIVPEWYLLPFYAILRSIPDKLLGVITMFAAILVLLVLPFTDRSVVRGNTFKVLSKFFFFIFVFNFVLLGQIGACHVEVPYVLMGQIATFIYFAYFLIIVPVISTIENVLFYIGRVNK

Source Source

Source organism organism	Saccharomyces cerevisiae
Common name common_name	;baker's yeast ;
NCBI taxonomy ID ncbi_taxonomy_id	4932

Entity 4 Entity 4 polymer

Description description	CYTOCHROME C1
Molecular weight formula_weight	27423.9 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	D

MTAAEHGLHAPAYAWSHNGPFETFDHASIRRGYQVYREVCAACHSLDRVAWRTLVGVSHTNEEVRNMAEEFEYDDEPDEQGNPKKRPGKLSDYIPGPYPNEQAARAANQGALPPDLSLIVKARHGGCDYIFSLLTGYPDEPPAGVALPPGSNYNPYFPGGSIAMARVLFDDMVEYEDGTPATTSQMAKDVTTFLNWCAEPEHDERKRLGLKTVIILSSLYLLSIWVKKFKWAGIKTRKFVFNPPK

Source Source

Source organism organism	Saccharomyces cerevisiae
Common name common_name	;baker's yeast ;
NCBI taxonomy ID ncbi_taxonomy_id	4932

Entity 5 Entity 5 polymer

Description description	UBIQUINOL-CYTOCHROME C REDUCTASE IRON-SULFUR SUBUNIT
Molecular weight formula_weight	20123.0 kDa
EC 编号 ec_number	1.10.2.2
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	E

KSTYRTPNFDDVLKENNDADKGRSYAYFMVGAMGLLSSAGAKSTVETFISSMTATADVLAMAKVEVNLAAIPLGKNVVVKWQGKPVFIRHRTPHEIQEANSVDMSALKDPQTDADRVKDPQWLIMLGICTHLGCVPIGEAGDFGGWFCPCHGSHYDISGRIRKGPAPLNLEIPAYEFDGDKVIVG

Source Source

Source organism organism	Saccharomyces cerevisiae
Common name common_name	;baker's yeast ;
NCBI taxonomy ID ncbi_taxonomy_id	4932

Entity 6 Entity 6 polymer

Description description	UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX 17 KD PROTEIN
Molecular weight formula_weight	8854.8 kDa
EC 编号 ec_number	1.10.2.2
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	H

VTDQLEDLREHFKNTEEGKALVHHYEECAERVKIQQQQPGYADLEHKEDCVEEFFHLQHYLDTATAPRLFDKLK

Source Source

Source organism organism	Saccharomyces cerevisiae
Common name common_name	;baker's yeast ;
NCBI taxonomy ID ncbi_taxonomy_id	4932

Entity 7 Entity 7 polymer

Description description	UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX 14 KD PROTEIN
Molecular weight formula_weight	14355.4 kDa
EC 编号 ec_number	1.10.2.2
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	F

QSFTSIARIGDYILKSPVLSKLCVPVANQFINLAGYKKLGLKFDDLIAEENPIMQTALRRLPEDESYARAYRIIRAHQTELTHHLLPRNEWIKAQEDVPYLLPYILEAEAAAKEKDELDNIEVSK

Source Source

Source organism organism	Saccharomyces cerevisiae
Common name common_name	;baker's yeast ;
NCBI taxonomy ID ncbi_taxonomy_id	4932

Entity 8 Entity 8 polymer

Description description	UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX UBIQUINONE-BINDING PROTEIN QP-C
Molecular weight formula_weight	10856.3 kDa
EC 编号 ec_number	1.10.2.2
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	G

GPPSGKTYMGWWGHMGGPKQKGITSYAVSPYAQKPLQGIFHNAVFNSFRRFKSQFLYVLIPAGIYWYWWKNGNEYNEFLYSKAGREELERVNV

Source Source

Source organism organism	Saccharomyces cerevisiae
Common name common_name	;baker's yeast ;
NCBI taxonomy ID ncbi_taxonomy_id	4932

Entity 9 Entity 9 polymer

Description description	UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX 7.3 KD PROTEIN
Molecular weight formula_weight	6301.2 kDa
EC 编号 ec_number	1.10.2.2
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	I

SSLYKTFFKRNAVFVGTIFAGAFVFQTVFDTAITSWYENHNKGKLWKDVKARIAA

Source Source

Source organism organism	Saccharomyces cerevisiae
Common name common_name	;baker's yeast ;
NCBI taxonomy ID ncbi_taxonomy_id	4932

Entity 10 Entity 10 polymer

Description description	HEAVY CHAIN (VH) OF FV-FRAGMENT
Molecular weight formula_weight	14365.8 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	X

EVKLQESGAGLVQPSQSLSLTCSVTGYSITSGYYWNWIRLFPGNKLEWVGYISNVGDNNYNPSLKDRLSITRDTSKNQFFLKLNSVTTEDTATYYCARSEYYSVTGYAMDYWGQGTTVTVSSAWRHP

Source Source

Source organism organism	Mus musculus
Common name common_name	house mouse
NCBI taxonomy ID ncbi_taxonomy_id	10090
Host organism host_organism	Escherichia coli

Entity 11 Entity 11 polymer

Description description	LIGHT CHAIN (VL) OF FV-FRAGMENT
Molecular weight formula_weight	11926.4 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	Y

DIELTQTPVSLAASLGDRVTISCRASQDINNFLNWYQQKPDGTIKLLIYYTSRLHAGVPSRFSGSGSGTDYSLTISNLEPEDIATYFCQHHIKFPWTFGAGTKLEIK

Source Source

Source organism organism	Mus musculus
Common name common_name	house mouse
NCBI taxonomy ID ncbi_taxonomy_id	10090
Host organism host_organism	Escherichia coli

Entity 12 Entity 12 non-polymer

Description description	PROTOPORPHYRIN IX CONTAINING FE
Molecular weight formula_weight	616.5 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 13 Entity 13 non-polymer

Description description	STIGMATELLIN A
Molecular weight formula_weight	514.6 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 14 Entity 14 non-polymer

Description description	5-(3,7,11,15,19,23-HEXAMETHYL-TETRACOSA-2,6,10,14,18,22-HEXAENYL)-2,3-DIMETHOXY-6-METHYL-BENZENE-1,4-DIOL
Molecular weight formula_weight	592.9 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 15 Entity 15 non-polymer

Description description	HEME C
Molecular weight formula_weight	618.5 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 16 Entity 16 non-polymer

Description description	FE2/S2 (INORGANIC) CLUSTER
Molecular weight formula_weight	175.8 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 17 Entity 17 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	346

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6. Fold Classification (SCOP + CATH) 31 domains

SCOP 2.08 (16 domains)

Domain ID domain_id	d1ezva1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.185 — LuxS/MPP-like metallohydrolase
Superfamily Superfamily superfamily	d.185.1 — LuxS/MPP-like metallohydrolase
Family Family family	d.185.1.1 — MPP-like

Domain ID domain_id	d1ezva2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.185 — LuxS/MPP-like metallohydrolase
Superfamily Superfamily superfamily	d.185.1 — LuxS/MPP-like metallohydrolase
Family Family family	d.185.1.1 — MPP-like

Domain ID domain_id	d1ezvb1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.185 — LuxS/MPP-like metallohydrolase
Superfamily Superfamily superfamily	d.185.1 — LuxS/MPP-like metallohydrolase
Family Family family	d.185.1.1 — MPP-like

Domain ID domain_id	d1ezvb2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.185 — LuxS/MPP-like metallohydrolase
Superfamily Superfamily superfamily	d.185.1 — LuxS/MPP-like metallohydrolase
Family Family family	d.185.1.1 — MPP-like

Domain ID domain_id	d1ezvc2
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.32 — a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)
Superfamily Superfamily superfamily	f.32.1 — a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)
Family Family family	f.32.1.1 — a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)

Domain ID domain_id	d1ezvc3
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.21 — Heme-binding four-helical bundle
Superfamily Superfamily superfamily	f.21.1 — Transmembrane di-heme cytochromes
Family Family family	f.21.1.2 — Cytochrome b of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)

Domain ID domain_id	d1ezvd1
Class class	a — All alpha proteins
Fold Fold fold	a.3 — Cytochrome c
Superfamily Superfamily superfamily	a.3.1 — Cytochrome c
Family Family family	a.3.1.3 — Cytochrome bc1 domain

Domain ID domain_id	d1ezvd2
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.23 — Single transmembrane helix
Superfamily Superfamily superfamily	f.23.11 — Cytochrome c1 subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase), transmembrane anchor
Family Family family	f.23.11.1 — Cytochrome c1 subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase), transmembrane anchor

Domain ID domain_id	d1ezve1
Class class	b — All beta proteins
Fold Fold fold	b.33 — ISP domain
Superfamily Superfamily superfamily	b.33.1 — ISP domain
Family Family family	b.33.1.1 — Rieske iron-sulfur protein (ISP)

Domain ID domain_id	d1ezve2
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.23 — Single transmembrane helix
Superfamily Superfamily superfamily	f.23.12 — ISP transmembrane anchor
Family Family family	f.23.12.1 — ISP transmembrane anchor

Domain ID domain_id	d1ezvf_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.27 — 14 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)
Superfamily Superfamily superfamily	f.27.1 — 14 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)
Family Family family	f.27.1.1 — 14 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)

Domain ID domain_id	d1ezvg_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.23 — Single transmembrane helix
Superfamily Superfamily superfamily	f.23.13 — Ubiquinone-binding protein QP-C of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)
Family Family family	f.23.13.1 — Ubiquinone-binding protein QP-C of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)

Domain ID domain_id	d1ezvh_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.28 — Non-heme 11 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)
Superfamily Superfamily superfamily	f.28.1 — Non-heme 11 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)
Family Family family	f.28.1.1 — Non-heme 11 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)

Domain ID domain_id	d1ezvi_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.23 — Single transmembrane helix
Superfamily Superfamily superfamily	f.23.14 — Subunit X (non-heme 7 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)
Family Family family	f.23.14.1 — Subunit X (non-heme 7 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)

Domain ID domain_id	d1ezvx_
Class class	b — All beta proteins
Fold Fold fold	b.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamily	b.1.1 — Immunoglobulin
Family Family family	b.1.1.1 — V set domains (antibody variable domain-like)

Domain ID domain_id	d1ezvy_
Class class	b — All beta proteins
Fold Fold fold	b.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamily	b.1.1 — Immunoglobulin
Family Family family	b.1.1.1 — V set domains (antibody variable domain-like)

CATH v4.4 (15 domains)

Domain ID domain_id	1ezvA01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	830 — Cytochrome Bc1 Complex; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Metalloenzyme, LuxS/M16 peptidase-like

Domain ID domain_id	1ezvA02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	830 — Cytochrome Bc1 Complex; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Metalloenzyme, LuxS/M16 peptidase-like

Domain ID domain_id	1ezvB01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	830 — Cytochrome Bc1 Complex; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Metalloenzyme, LuxS/M16 peptidase-like

Domain ID domain_id	1ezvB02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	830 — Cytochrome Bc1 Complex; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Metalloenzyme, LuxS/M16 peptidase-like

Domain ID domain_id	1ezvC00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	810 — Cytochrome Bc1 Complex; Chain C
Homologous superfamily homologous superfamily	10 — Cytochrome Bc1 Complex; Chain C

Domain ID domain_id	1ezvD01
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	100 — Cytochrome c1, transmembrane anchor, C-terminal

Domain ID domain_id	1ezvD02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	760 — Cytochrome Bc1 Complex; Chain D, domain 2
Homologous superfamily homologous superfamily	10 — Cytochrome c-like domain

Domain ID domain_id	1ezvE01
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	270 — Ubiquinol cytochrome reductase, transmembrane domain

Domain ID domain_id	1ezvE02
Class class	2 — Mainly Beta
Architecture architecture	102 — 3-layer Sandwich
Topology topology	10 — Rieske Iron-sulfur Protein
Homologous superfamily homologous superfamily	10 — Rieske [2Fe-2S] iron-sulphur domain

Domain ID domain_id	1ezvF00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	1090 — Cytochrome Bc1 Complex; Chain F
Homologous superfamily homologous superfamily	10 — Cytochrome b-c1 complex subunit 7

Domain ID domain_id	1ezvG00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	210 — Cytochrome b-c1 complex subunit 8

Domain ID domain_id	1ezvH00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	287 — Helix Hairpins
Homologous superfamily homologous superfamily	20 — Ubiquinol-cytochrome C reductase hinge domain

Domain ID domain_id	1ezvI00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	260 — Cytochrome b-c1 complex subunit 9

Domain ID domain_id	1ezvX00
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	10 — Immunoglobulins

Domain ID domain_id	1ezvY00
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	10 — Immunoglobulins

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Unit-cell length a length_a	214.470 Å
Unit-cell length b length_b	163.920 Å
Unit-cell length c length_c	147.270 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	117.50 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

Space group space_group	C 1 2 1
Space-group number int_tables_number	5
Crystal system crystal_system	—

Resolution resolution	2.300 Å
Low-resolution limit resolution_low	15.000 Å
R factor r_factor	0.2530
R_work r_work	0.2220
R_free r_free	0.2540

STRUCTURE OF THE YEAST CYTOCHROME BC1 COMPLEX CO-CRYSTALLIZED WITH AN ANTIBODY FV-FRAGMENT

1. Protein Identity and Related Structures Protein Identity & Related Structures

UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX CORE PROTEIN I

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX 7.3 KD PROTEIN

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

1ezv__assembly_1__model_1

1ezv__assembly_1__model_1 | I(q)

1ezv__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

5. Entities and Polymers Entities & Polymers (17)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Source Source

Entity 4 Entity 4 polymer

Polymer Polymer

Source Source

Entity 5 Entity 5 polymer

Polymer Polymer

Source Source

Entity 6 Entity 6 polymer

Polymer Polymer

Source Source

Entity 7 Entity 7 polymer

Polymer Polymer

Source Source

Entity 8 Entity 8 polymer

Polymer Polymer

Source Source

Entity 9 Entity 9 polymer

Polymer Polymer

Source Source

Entity 10 Entity 10 polymer

Polymer Polymer

Source Source

Entity 11 Entity 11 polymer

Polymer Polymer

Source Source

Entity 12 Entity 12 non-polymer

Entity 13 Entity 13 non-polymer

Entity 14 Entity 14 non-polymer

Entity 15 Entity 15 non-polymer

Entity 16 Entity 16 non-polymer

Entity 17 Entity 17 water

6. Fold Classification (SCOP + CATH) 31 domains

SCOP 2.08 (16 domains)

CATH v4.4 (15 domains)

7. Citations (1)