2iso

Ternary complex of DNA Polymerase beta with a dideoxy terminated primer and 2'-deoxyguanosine 5'-beta, gamma-difluoromethylene triphosphate

Method: X-RAY DIFFRACTION

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

Polymerase (DNA directed), beta

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Monomer	Protein 1 DNA 3	5'-D(CPCPGPAPCPCPGPCPGPCPAPTPCPAPGPC)-3' × 1 5'-D(GPCPTPGPAPTPGPCPGP(DOC))-3' × 1 5'-D(PGPTPCPGP*G)-3' × 1 MAGNESIUM ION × 1 SODIUM ION × 3 CHLORIDE ION × 4 2'-DEOXY-5'-O-[({[DIFLUORO(PHOSPHONO)METHYL](HYDROXY)PHOSPHORYL}OXY)(HYDROXY)PHOSPHORYL]GUANOSINE × 1 water × 4	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q3KP48_HUMAN
Isoform	—
PDB entities	4
Chains and sequence ranges	Author chain A； PDBConstruct 1–335； UniProt 1–335

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	2iso
Deposition date deposition_date	2006-10-18
Structure title title	Ternary complex of DNA Polymerase beta with a dideoxy terminated primer and 2'-deoxyguanosine 5'-beta, gamma-difluoromethylene triphosphate
Keywords keywords	nucleotidyl transferase, polymerase, leaving-group, TRANSFERASE-DNA COMPLEX; TRANSFERASE/DNA
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.

2iso__assembly_1__model_1

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

Download this curve (.dat)

2iso__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2iso__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	22.94 Å
Rg (electron density)	22.25 Å
Total Rg	23.01 Å
Atom count	3277
Residues	356
Excluded volume	56253 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2iso__assembly_1__model_1`	tetrameric （4）	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 (9)

Entity 1 Entity 1 polymer

Description description	5'-D(CPCPGPAPCPCPGPCPGPCPAPTPCPAPGPC)-3'
Molecular weight formula_weight	4829.1 kDa
Source method src_method	syn
Copy count entity_count	1

Polymer Polymer

Polymer type type	polydeoxyribonucleotide
Chain IDs strand_id	T
Atom count atom_count	3661

CCGACCGCGCATCAGC

Entity 2 Entity 2 polymer

Description description	5'-D(GPCPTPGPAPTPGPCPGP(DOC))-3'
Molecular weight formula_weight	3045.0 kDa
Source method src_method	syn
Copy count entity_count	1

Polymer Polymer

Polymer type type	polydeoxyribonucleotide
Chain IDs strand_id	P

GCTGATGCGC

Entity 3 Entity 3 polymer

Description description	5'-D(PGPTPCPGP*G)-3'
Molecular weight formula_weight	1536.0 kDa
Source method src_method	syn
Copy count entity_count	1

Polymer Polymer

Polymer type type	polydeoxyribonucleotide
Chain IDs strand_id	D

GTCGG

Entity 4 Entity 4 polymer

Description description	Polymerase (DNA directed), beta
Molecular weight formula_weight	38241.7 kDa
EC 编号 ec_number	2.7.7.7
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A

MSKRKAPQETLNGGITDMLTELANFEKNVSQAIHKYNAYRKAASVIAKYPHKIKSGAEAKKLPGVGTKIAEKIDEFLATGKLRKLEKIRQDDTSSSINFLTRVSGIGPSAARKFVDEGIKTLEDLRKNEDKLNHHQRIGLKYFGDFEKRIPREEMLQMQDIVLNEVKKVDSEYIATVCGSFRRGAESSGDMDVLLTHPSFTSESTKQPKLLHQVVEQLQKVHFITDTLSKGETKFMGVCQLPSKNDEKEYPHRRIDIRLIPKDQYYCGVLYFTGSDIFNKNMRAHALEKGFTINEYTIRPLGVTGVAGEPLPVDSEKDIFDYIQWKYREPKDRSE

Source Source

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

Entity 5 Entity 5 non-polymer

Description description	MAGNESIUM ION
Molecular weight formula_weight	24.3 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 6 Entity 6 non-polymer

Description description	SODIUM ION
Molecular weight formula_weight	23.0 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 7 Entity 7 non-polymer

Description description	CHLORIDE ION
Molecular weight formula_weight	35.5 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 8 Entity 8 non-polymer

Description description	2'-DEOXY-5'-O-[({[DIFLUORO(PHOSPHONO)METHYL](HYDROXY)PHOSPHORYL}OXY)(HYDROXY)PHOSPHORYL]GUANOSINE
Molecular weight formula_weight	541.2 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 9 Entity 9 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	367

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6. Fold Classification (SCOP + CATH) 7 domains

SCOP 2.08 (3 domains)

Domain ID domain_id	d2isoa1
Class class	a — All alpha proteins
Fold Fold fold	a.60 — SAM domain-like
Superfamily Superfamily superfamily	a.60.6 — DNA polymerase beta, N-terminal domain-like
Family Family family	a.60.6.1 — DNA polymerase beta, N-terminal domain-like

Domain ID domain_id	d2isoa2
Class class	a — All alpha proteins
Fold Fold fold	a.60 — SAM domain-like
Superfamily Superfamily superfamily	a.60.12 — PsbU/PolX domain-like
Family Family family	a.60.12.1 — DNA polymerase beta-like, second domain

Domain ID domain_id	d2isoa3
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.218 — Nucleotidyltransferase
Superfamily Superfamily superfamily	d.218.1 — Nucleotidyltransferase
Family Family family	d.218.1.2 — DNA polymerase beta-like

CATH v4.4 (4 domains)

Domain ID domain_id	2isoA01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	150 — DNA polymerase; domain 1
Homologous superfamily homologous superfamily	110 — DNA polymerase beta, N-terminal domain-like

Domain ID domain_id	2isoA02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	150 — DNA polymerase; domain 1
Homologous superfamily homologous superfamily	20 — 5' to 3' exonuclease, C-terminal subdomain

Domain ID domain_id	2isoA03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	460 — Beta Polymerase; domain 2
Homologous superfamily homologous superfamily	10 — Beta Polymerase, domain 2

Domain ID domain_id	2isoA04
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	210 — Beta Polymerase; domain 3
Homologous superfamily homologous superfamily	10 — DNA polymerase, thumb domain

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Unit-cell length a length_a	50.700 Å
Unit-cell length b length_b	80.500 Å
Unit-cell length c length_c	55.400 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	108.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	2

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

Resolution resolution	2.100 Å
Low-resolution limit resolution_low	22.350 Å
R factor r_factor	0.2010
R_work r_work	0.2010
R_free r_free	0.2600

Ternary complex of DNA Polymerase beta with a dideoxy terminated primer and 2'-deoxyguanosine 5'-beta, gamma-difluoromethylene triphosphate

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

Polymerase (DNA directed), beta

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

2iso__assembly_1__model_1

2iso__assembly_1__model_1 | I(q)

2iso__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 (9)

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 polymer

Polymer Polymer

Source Source

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 water

6. Fold Classification (SCOP + CATH) 7 domains

SCOP 2.08 (3 domains)

CATH v4.4 (4 domains)

7. Citations (1)

Ternary complex of DNA Polymerase beta with a dideoxy terminated primer and 2'-deoxyguanosine 5'-beta, gamma-difluoromethylene triphosphate

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

Polymerase (DNA directed), beta

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

2iso__assembly_1__model_1

2iso__assembly_1__model_1 | I(q)

2iso__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 (9)

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 polymer

Polymer Polymer

Source Source

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 water

6. Fold Classification (SCOP + CATH) 7 domains

SCOP 2.08 (3 domains)

CATH v4.4 (4 domains)

7. Citations (1)