1hbm

METHYL-COENZYME M REDUCTASE ENZYME PRODUCT COMPLEX

Method: X-RAY DIFFRACTION

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

METHYL-COENZYME M REDUCTASE I ALPHA SUBUNIT

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 6	METHYL-COENZYME M REDUCTASE I BETA SUBUNIT × 2 （P11560） METHYL-COENZYME M REDUCTASE I GAMMA SUBUNIT × 2 （P11562） FACTOR 430 × 2 O-PHOSPHONO-N-{(2E)-7-[(2-SULFOETHYL)DITHIO]HEPT-2-ENOYL}-L-THREONINE × 2 GLYCEROL × 11 SODIUM ION × 9 CHLORIDE ION × 2 MAGNESIUM ION × 5 ZINC ION × 1 water × 6	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	MCRA_METTM
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–549； UniProt 1–549 Author chain D； PDBConstruct 1–549； UniProt 1–549

METHYL-COENZYME M REDUCTASE I BETA SUBUNIT

OrganismNot specified

UniProt P11560

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 6	METHYL-COENZYME M REDUCTASE I ALPHA SUBUNIT × 2 （P11558） METHYL-COENZYME M REDUCTASE I GAMMA SUBUNIT × 2 （P11562） FACTOR 430 × 2 O-PHOSPHONO-N-{(2E)-7-[(2-SULFOETHYL)DITHIO]HEPT-2-ENOYL}-L-THREONINE × 2 GLYCEROL × 11 SODIUM ION × 9 CHLORIDE ION × 2 MAGNESIUM ION × 5 ZINC ION × 1 water × 6	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	MCRB_METTM
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 1–442； UniProt 1–442 Author chain E； PDBConstruct 1–442； UniProt 1–442

METHYL-COENZYME M REDUCTASE I GAMMA SUBUNIT

OrganismNot specified

UniProt P11562

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 6	METHYL-COENZYME M REDUCTASE I ALPHA SUBUNIT × 2 （P11558） METHYL-COENZYME M REDUCTASE I BETA SUBUNIT × 2 （P11560） FACTOR 430 × 2 O-PHOSPHONO-N-{(2E)-7-[(2-SULFOETHYL)DITHIO]HEPT-2-ENOYL}-L-THREONINE × 2 GLYCEROL × 11 SODIUM ION × 9 CHLORIDE ION × 2 MAGNESIUM ION × 5 ZINC ION × 1 water × 6	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	MCRG_METTM
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain C； PDBConstruct 1–248； UniProt 1–248 Author chain F； PDBConstruct 1–248； UniProt 1–248

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	1hbm
Deposition date deposition_date	2001-04-20
Structure title title	METHYL-COENZYME M REDUCTASE ENZYME PRODUCT COMPLEX
Keywords keywords	METHANOGENESIS, BIOLOGICAL METHANOGENESIS, NI-ENZYME, OXIDOREDUCTASE; METHANOGENESIS
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.

1hbm__assembly_1__model_1

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

Download this curve (.dat)

1hbm__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1hbm__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	38.65 Å
Rg (electron density)	37.78 Å
Total Rg	38.20 Å
Atom count	19375
Residues	2464
Excluded volume	343350 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1hbm__assembly_1__model_1`	hexameric （6）	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 (11)

Entity 1 Entity 1 polymer

Description description	METHYL-COENZYME M REDUCTASE I ALPHA SUBUNIT
Molecular weight formula_weight	60508.5 kDa
Source method src_method	nat
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,D
Atom count atom_count	21641

ADKLFINALKKKFEESPEEKKTTFYTLGGWKQSERKTEFVNAGKEVAAKRGIPQYNPDIGTPLGQRVLMPYQVSTTDTYVEGDDLHFVNNAAMQQMWDDIRRTVIVGLNHAHAVIEKRLGKEVTPETITHYLETVNHAMPGAAVVQEHMVETHPALVADSYVKVFTGNDEIADEIDPAFVIDINKQFPEDQAETLKAEVGDGIWQVVRIPTIVSRTCDGATTSRWSAMQIGMSMISAYKQAAGEAATGDFAYAAKHAEVIHMGTYLPVRRARGENEPGGVPFGYLADICQSSRVNYEDPVRVSLDVVATGAMLYDQIWLGSYMSGGVGFTQYATAAYTDNILDDFTYFGKEYVEDKYGLCEAPNNMDTVLDVATEVTFYGLEQYEEYPALLEDQFGGSQRAAVVAAAAGCSTAFATGNAQTGLSGWYLSMYLHKEQHSRLGFYGYDLQDQCGASNVFSIRGDEGLPLELRGPNYPNYAMNVGHQGEYAGISQAPHAARGDAFVFNPLVKIAFADDNLVFDFTNVRGEFAKGALREFEPAGERALITPAK

Entity 2 Entity 2 polymer

Description description	METHYL-COENZYME M REDUCTASE I BETA SUBUNIT
Molecular weight formula_weight	47148.5 kDa
Source method src_method	nat
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B,E

AKFEDKVDLYDDRGNLVEEQVPLEALSPLRNPAIKSIVQGIKRTVAVNLEGIENALKTAKVGGPACKIMGRELDLDIVGNAESIAAAAKEMIQVTEDDDTNVELLGGGKRALVQVPSARFDVAAEYSAAPLVTATAFVQAIINEFDVSMYDANMVKAAVLGRYPQSVEYMGANIATMLDIPQKLEGPGYALRNIMVNHVVAATLKNTLQAAALSTILEQTAMFEMGDAVGAFERMHLLGLAYQGMNADNLVFDLVKANGKEGTVGSVIADLVERALEDGVIKVEKELTDYKVYGTDDLAMWNAYAAAGLMAATMVNQGAARAAQGVSSTLLYYNDLIEFETGLPSVDFGKVEGTAVGFSFFSHSIYGGGGPGIFNGNHIVTRHSKGFAIPCVAAAMALDAGTQMFSPEATSGLIKEVFSQVDEFREPLKYVVEAAAEIKNEI

Entity 3 Entity 3 polymer

Description description	METHYL-COENZYME M REDUCTASE I GAMMA SUBUNIT
Molecular weight formula_weight	28666.0 kDa
Source method src_method	nat
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C,F

AQYYPGTTKVAQNRRNFCNPEYELEKLREISDEDVVKILGHRAPGEEYPSVHPPLEEMDEPEDAIREMVEPIDGAKAGDRVRYIQFTDSMYFAPAQPYVRSRAYLCRYRGADAGTLSGRQIIETRERDLEKISKELLETEFFDPARSGVRGKSVHGHSLRLDEDGMMFDMLRRQIYNKDTGRVEMVKNQIGDELDEPVDLGEPLDEETLMEKTTIYRVDGEAYRDDVEAVEIMQRIHVLRSQGGFNLE

Entity 4 Entity 4 non-polymer

Description description	FACTOR 430
Molecular weight formula_weight	906.6 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 5 Entity 5 non-polymer

Description description	O-PHOSPHONO-N-{(2E)-7-[(2-SULFOETHYL)DITHIO]HEPT-2-ENOYL}-L-THREONINE
Molecular weight formula_weight	481.5 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 6 Entity 6 non-polymer

Description description	GLYCEROL
Molecular weight formula_weight	92.1 kDa
Source method src_method	syn
Copy count entity_count	11

Entity 7 Entity 7 non-polymer

Description description	SODIUM ION
Molecular weight formula_weight	23.0 kDa
Source method src_method	syn
Copy count entity_count	9

Entity 8 Entity 8 non-polymer

Description description	CHLORIDE ION
Molecular weight formula_weight	35.5 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 9 Entity 9 non-polymer

Description description	MAGNESIUM ION
Molecular weight formula_weight	24.3 kDa
Source method src_method	syn
Copy count entity_count	5

Entity 10 Entity 10 non-polymer

Description description	ZINC ION
Molecular weight formula_weight	65.4 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 11 Entity 11 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	2092

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6. Fold Classification (SCOP + CATH) 22 domains

SCOP 2.08 (10 domains)

Domain ID domain_id	d1hbma1
Class class	a — All alpha proteins
Fold Fold fold	a.89 — Methyl-coenzyme M reductase alpha and beta chain C-terminal domain
Superfamily Superfamily superfamily	a.89.1 — Methyl-coenzyme M reductase alpha and beta chain C-terminal domain
Family Family family	a.89.1.1 — Methyl-coenzyme M reductase alpha and beta chain C-terminal domain

Domain ID domain_id	d1hbma2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.58 — Ferredoxin-like
Superfamily Superfamily superfamily	d.58.31 — Methyl-coenzyme M reductase subunits
Family Family family	d.58.31.2 — Methyl-coenzyme M reductase alpha and beta chain N-terminal domain

Domain ID domain_id	d1hbmb1
Class class	a — All alpha proteins
Fold Fold fold	a.89 — Methyl-coenzyme M reductase alpha and beta chain C-terminal domain
Superfamily Superfamily superfamily	a.89.1 — Methyl-coenzyme M reductase alpha and beta chain C-terminal domain
Family Family family	a.89.1.1 — Methyl-coenzyme M reductase alpha and beta chain C-terminal domain

Domain ID domain_id	d1hbmb2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.58 — Ferredoxin-like
Superfamily Superfamily superfamily	d.58.31 — Methyl-coenzyme M reductase subunits
Family Family family	d.58.31.2 — Methyl-coenzyme M reductase alpha and beta chain N-terminal domain

Domain ID domain_id	d1hbmc_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.58 — Ferredoxin-like
Superfamily Superfamily superfamily	d.58.31 — Methyl-coenzyme M reductase subunits
Family Family family	d.58.31.1 — Methyl-coenzyme M reductase gamma chain

Domain ID domain_id	d1hbmd1
Class class	a — All alpha proteins
Fold Fold fold	a.89 — Methyl-coenzyme M reductase alpha and beta chain C-terminal domain
Superfamily Superfamily superfamily	a.89.1 — Methyl-coenzyme M reductase alpha and beta chain C-terminal domain
Family Family family	a.89.1.1 — Methyl-coenzyme M reductase alpha and beta chain C-terminal domain

Domain ID domain_id	d1hbmd2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.58 — Ferredoxin-like
Superfamily Superfamily superfamily	d.58.31 — Methyl-coenzyme M reductase subunits
Family Family family	d.58.31.2 — Methyl-coenzyme M reductase alpha and beta chain N-terminal domain

Domain ID domain_id	d1hbme1
Class class	a — All alpha proteins
Fold Fold fold	a.89 — Methyl-coenzyme M reductase alpha and beta chain C-terminal domain
Superfamily Superfamily superfamily	a.89.1 — Methyl-coenzyme M reductase alpha and beta chain C-terminal domain
Family Family family	a.89.1.1 — Methyl-coenzyme M reductase alpha and beta chain C-terminal domain

Domain ID domain_id	d1hbme2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.58 — Ferredoxin-like
Superfamily Superfamily superfamily	d.58.31 — Methyl-coenzyme M reductase subunits
Family Family family	d.58.31.2 — Methyl-coenzyme M reductase alpha and beta chain N-terminal domain

Domain ID domain_id	d1hbmf_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.58 — Ferredoxin-like
Superfamily Superfamily superfamily	d.58.31 — Methyl-coenzyme M reductase subunits
Family Family family	d.58.31.1 — Methyl-coenzyme M reductase gamma chain

CATH v4.4 (12 domains)

Domain ID domain_id	1hbmA01
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	390 — Methyl-coenzyme M Reductase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Methyl-coenzyme M Reductase; Chain A, domain 1

Domain ID domain_id	1hbmA02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	470 —

Domain ID domain_id	1hbmA03
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	840 — Methyl-coenzyme M Reductase; Chain B, domain 2
Homologous superfamily homologous superfamily	10 — Methyl-coenzyme M reductase, alpha/beta subunit, C-terminal

Domain ID domain_id	1hbmB01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	470 —

Domain ID domain_id	1hbmB02
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	840 — Methyl-coenzyme M Reductase; Chain B, domain 2
Homologous superfamily homologous superfamily	10 — Methyl-coenzyme M reductase, alpha/beta subunit, C-terminal

Domain ID domain_id	1hbmC00
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	320 — Lambda Exonuclease; Chain A
Homologous superfamily homologous superfamily	20 — Methyl-coenzyme M reductase, gamma subunit

Domain ID domain_id	1hbmD01
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	390 — Methyl-coenzyme M Reductase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Methyl-coenzyme M Reductase; Chain A, domain 1

Domain ID domain_id	1hbmD02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	470 —

Domain ID domain_id	1hbmD03
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	840 — Methyl-coenzyme M Reductase; Chain B, domain 2
Homologous superfamily homologous superfamily	10 — Methyl-coenzyme M reductase, alpha/beta subunit, C-terminal

Domain ID domain_id	1hbmE01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	470 —

Domain ID domain_id	1hbmE02
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	840 — Methyl-coenzyme M Reductase; Chain B, domain 2
Homologous superfamily homologous superfamily	10 — Methyl-coenzyme M reductase, alpha/beta subunit, C-terminal

Domain ID domain_id	1hbmF00
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	320 — Lambda Exonuclease; Chain A
Homologous superfamily homologous superfamily	20 — Methyl-coenzyme M reductase, gamma subunit

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Unit-cell length a length_a	82.000 Å
Unit-cell length b length_b	118.300 Å
Unit-cell length c length_c	122.800 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	92.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	1.800 Å
Low-resolution limit resolution_low	10.000 Å
R factor r_factor	—
R_work r_work	0.1640
R_free r_free	0.1930

METHYL-COENZYME M REDUCTASE ENZYME PRODUCT COMPLEX

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

METHYL-COENZYME M REDUCTASE I ALPHA SUBUNIT

State in the Current Structure

Other States of the Same Protein in the Database

METHYL-COENZYME M REDUCTASE I BETA SUBUNIT

State in the Current Structure

Other States of the Same Protein in the Database

METHYL-COENZYME M REDUCTASE I GAMMA SUBUNIT

State in the Current Structure

Other States of the Same Protein in the Database

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

1hbm__assembly_1__model_1

1hbm__assembly_1__model_1 | I(q)

1hbm__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (11)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 polymer

Polymer Polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 non-polymer

Entity 7 Entity 7 non-polymer

Entity 8 Entity 8 non-polymer

Entity 9 Entity 9 non-polymer

Entity 10 Entity 10 non-polymer

Entity 11 Entity 11 water

6. Fold Classification (SCOP + CATH) 22 domains

SCOP 2.08 (10 domains)

CATH v4.4 (12 domains)

7. Citations (1)

METHYL-COENZYME M REDUCTASE ENZYME PRODUCT COMPLEX

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

METHYL-COENZYME M REDUCTASE I ALPHA SUBUNIT

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

METHYL-COENZYME M REDUCTASE I BETA SUBUNIT

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

METHYL-COENZYME M REDUCTASE I GAMMA SUBUNIT

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

1hbm__assembly_1__model_1

1hbm__assembly_1__model_1 | I(q)

1hbm__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (11)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 polymer

Polymer Polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 non-polymer

Entity 7 Entity 7 non-polymer

Entity 8 Entity 8 non-polymer

Entity 9 Entity 9 non-polymer

Entity 10 Entity 10 non-polymer

Entity 11 Entity 11 water

6. Fold Classification (SCOP + CATH) 22 domains

SCOP 2.08 (10 domains)

CATH v4.4 (12 domains)

7. Citations (1)