1tbg

BETA-GAMMA DIMER OF THE HETEROTRIMERIC G-PROTEIN TRANSDUCIN

Method: X-RAY DIFFRACTION

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

TRANSDUCIN

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 8	TRANSDUCIN × 4 （P02698） water × 8	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 2	TRANSDUCIN × 1 （P02698） water × 2	Consistent with protein count
3	Protein heterocomplex	Heteromer	Protein 2	TRANSDUCIN × 1 （P02698） water × 2	Consistent with protein count
4	Protein heterocomplex	Heteromer	Protein 2	TRANSDUCIN × 1 （P02698） water × 2	Consistent with protein count
5	Protein heterocomplex	Heteromer	Protein 2	TRANSDUCIN × 1 （P02698） water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	GBB1_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–340； UniProt 1–340 Author chain B； PDBConstruct 1–340； UniProt 1–340 Author chain C； PDBConstruct 1–340； UniProt 1–340 Author chain D； PDBConstruct 1–340； UniProt 1–340

TRANSDUCIN

OrganismNot specified

UniProt P02698

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 8	TRANSDUCIN × 4 （P04901） water × 8	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 2	TRANSDUCIN × 1 （P04901） water × 2	Consistent with protein count
3	Protein heterocomplex	Heteromer	Protein 2	TRANSDUCIN × 1 （P04901） water × 2	Consistent with protein count
4	Protein heterocomplex	Heteromer	Protein 2	TRANSDUCIN × 1 （P04901） water × 2	Consistent with protein count
5	Protein heterocomplex	Heteromer	Protein 2	TRANSDUCIN × 1 （P04901） water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	GBG1_BOVIN
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain E； PDBConstruct 2–68； UniProt 1–67 Author chain F； PDBConstruct 2–68； UniProt 1–67 Author chain G； PDBConstruct 2–68； UniProt 1–67 Author chain H； PDBConstruct 2–68； UniProt 1–67

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	1tbg
Deposition date deposition_date	1996-06-15
Structure title title	BETA-GAMMA DIMER OF THE HETEROTRIMERIC G-PROTEIN TRANSDUCIN
Keywords keywords	COMPLEX (GTP-BINDING-TRANSDUCER), EYE, TRANSDUCER, PRENYLATION, COMPLEX (GTP-BINDING-TRANSDUCER) complex; COMPLEX (GTP-BINDING/TRANSDUCER)
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.

1tbg__assembly_4__model_1

Assembly 4 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

1tbg__assembly_4__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1tbg__assembly_4__model_1 | P(r) · Pending

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

Rg（Guinier）	22.28 Å
Rg (electron density)	21.36 Å
Total Rg	22.23 Å
Atom count	3127
Residues	405
Excluded volume	54914 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1tbg__assembly_1__model_1`	octameric （8）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1tbg__assembly_2__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`1tbg__assembly_3__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
4	1	`1tbg__assembly_4__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
5	1	`1tbg__assembly_5__model_1`	dimeric （2）	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 (3)

Entity 1 Entity 1 polymer

Description description	TRANSDUCIN
Molecular weight formula_weight	37416.9 kDa
Source method src_method	nat
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	13273

MSELDQLRQEAEQLKNQIRDARKACADATLSQITNNIDPVGRIQMRTRRTLRGHLAKIYAMHWGTDSRLLVSASQDGKLIIWDSYTTNKVHAIPLRSSWVMTCAYAPSGNYVACGGLDNICSIYNLKTREGNVRVSRELAGHTGYLSCCRFLDDNQIVTSSGDTTCALWDIETGQQTTTFTGHTGDVMSLSLAPDTRLFVSGACDASAKLWDVREGMCRQTFTGHESDINAICFFPNGNAFATGSDDATCRLFDLRADQELMTYSHDNIICGITSVSFSKSGRLLLAGYDDFNCNVWDALKADRAGVLAGHDNRVSCLGVTDDGMAVATGSWDSFLKIWN

Entity 2 Entity 2 polymer

Description description	TRANSDUCIN
Molecular weight formula_weight	7980.2 kDa
Source method src_method	nat
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	E,F,G,H

APVINIEDLTEKDKLKMEVDQLKKEVTLERMLVSKCCEEFRDYVEERSGEDPLVKGIPEDKNPFKELK

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	732

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6. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

Domain ID domain_id	d1tbga_
Class class	b — All beta proteins
Fold Fold fold	b.69 — 7-bladed beta-propeller
Superfamily Superfamily superfamily	b.69.4 — WD40 repeat-like
Family Family family	b.69.4.1 — WD40-repeat

Domain ID domain_id	d1tbgb_
Class class	b — All beta proteins
Fold Fold fold	b.69 — 7-bladed beta-propeller
Superfamily Superfamily superfamily	b.69.4 — WD40 repeat-like
Family Family family	b.69.4.1 — WD40-repeat

Domain ID domain_id	d1tbgc_
Class class	b — All beta proteins
Fold Fold fold	b.69 — 7-bladed beta-propeller
Superfamily Superfamily superfamily	b.69.4 — WD40 repeat-like
Family Family family	b.69.4.1 — WD40-repeat

Domain ID domain_id	d1tbgd_
Class class	b — All beta proteins
Fold Fold fold	b.69 — 7-bladed beta-propeller
Superfamily Superfamily superfamily	b.69.4 — WD40 repeat-like
Family Family family	b.69.4.1 — WD40-repeat

Domain ID domain_id	d1tbge_
Class class	a — All alpha proteins
Fold Fold fold	a.137 — Non-globular all-alpha subunits of globular proteins
Superfamily Superfamily superfamily	a.137.3 — Transducin (heterotrimeric G protein), gamma chain
Family Family family	a.137.3.1 — Transducin (heterotrimeric G protein), gamma chain

Domain ID domain_id	d1tbgf_
Class class	a — All alpha proteins
Fold Fold fold	a.137 — Non-globular all-alpha subunits of globular proteins
Superfamily Superfamily superfamily	a.137.3 — Transducin (heterotrimeric G protein), gamma chain
Family Family family	a.137.3.1 — Transducin (heterotrimeric G protein), gamma chain

Domain ID domain_id	d1tbgg_
Class class	a — All alpha proteins
Fold Fold fold	a.137 — Non-globular all-alpha subunits of globular proteins
Superfamily Superfamily superfamily	a.137.3 — Transducin (heterotrimeric G protein), gamma chain
Family Family family	a.137.3.1 — Transducin (heterotrimeric G protein), gamma chain

Domain ID domain_id	d1tbgh_
Class class	a — All alpha proteins
Fold Fold fold	a.137 — Non-globular all-alpha subunits of globular proteins
Superfamily Superfamily superfamily	a.137.3 — Transducin (heterotrimeric G protein), gamma chain
Family Family family	a.137.3.1 — Transducin (heterotrimeric G protein), gamma chain

CATH v4.4 (8 domains)

Domain ID domain_id	1tbgA00
Class class	2 — Mainly Beta
Architecture architecture	130 — 7 Propeller
Topology topology	10 — Methylamine Dehydrogenase; Chain H
Homologous superfamily homologous superfamily	10 — YVTN repeat-like/Quinoprotein amine dehydrogenase

Domain ID domain_id	1tbgB00
Class class	2 — Mainly Beta
Architecture architecture	130 — 7 Propeller
Topology topology	10 — Methylamine Dehydrogenase; Chain H
Homologous superfamily homologous superfamily	10 — YVTN repeat-like/Quinoprotein amine dehydrogenase

Domain ID domain_id	1tbgC00
Class class	2 — Mainly Beta
Architecture architecture	130 — 7 Propeller
Topology topology	10 — Methylamine Dehydrogenase; Chain H
Homologous superfamily homologous superfamily	10 — YVTN repeat-like/Quinoprotein amine dehydrogenase

Domain ID domain_id	1tbgD00
Class class	2 — Mainly Beta
Architecture architecture	130 — 7 Propeller
Topology topology	10 — Methylamine Dehydrogenase; Chain H
Homologous superfamily homologous superfamily	10 — YVTN repeat-like/Quinoprotein amine dehydrogenase

Domain ID domain_id	1tbgE00
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	260 — G Protein Gi Gamma 2
Homologous superfamily homologous superfamily	10 — Transducin (heterotrimeric G protein), gamma chain

Domain ID domain_id	1tbgF00
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	260 — G Protein Gi Gamma 2
Homologous superfamily homologous superfamily	10 — Transducin (heterotrimeric G protein), gamma chain

Domain ID domain_id	1tbgG00
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	260 — G Protein Gi Gamma 2
Homologous superfamily homologous superfamily	10 — Transducin (heterotrimeric G protein), gamma chain

Domain ID domain_id	1tbgH00
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	260 — G Protein Gi Gamma 2
Homologous superfamily homologous superfamily	10 — Transducin (heterotrimeric G protein), gamma chain

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Unit-cell length a length_a	85.100 Å
Unit-cell length b length_b	94.000 Å
Unit-cell length c length_c	194.700 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	16

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	2.100 Å
Low-resolution limit resolution_low	6.000 Å
R factor r_factor	0.2000
R_work r_work	0.2000
R_free r_free	0.3060

BETA-GAMMA DIMER OF THE HETEROTRIMERIC G-PROTEIN TRANSDUCIN

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

TRANSDUCIN

State in the Current Structure

Other States of the Same Protein in the Database

TRANSDUCIN

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

1tbg__assembly_4__model_1

1tbg__assembly_4__model_1 | I(q)

1tbg__assembly_4__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

CATH v4.4 (8 domains)

7. Citations (5)

BETA-GAMMA DIMER OF THE HETEROTRIMERIC G-PROTEIN TRANSDUCIN

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

TRANSDUCIN

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

TRANSDUCIN

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

1tbg__assembly_4__model_1

1tbg__assembly_4__model_1 | I(q)

1tbg__assembly_4__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

CATH v4.4 (8 domains)

7. Citations (5)