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3cmx

Mechanism of homologous recombination from the RecA-ssDNA/dsDNA structures

Method: X-RAY DIFFRACTION
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1. Protein Identity and Related Structures Protein Identity & Related Structures

Protein recA

Escherichia coli

UniProt P0A7G6

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein–DNA Monomer Protein 1 DNA 2 ;DNA (5'-D(*DTP*DTP*DTP*DTP*DTP*DTP*DTP*DTP*DTP*DTP*DTP*DTP*DTP*DTP*DT)-3') ; × 1 ;DNA (5'-D(*DAP*DAP*DAP*DAP*DAP*DAP*DAP*DAP*DAP*DAP*DAP*DA)-3') ; × 1 MAGNESIUM ION × 5 TETRAFLUOROALUMINATE ION × 5 ADENOSINE-5'-DIPHOSPHATE × 5 Consistent with all polymers
2 Protein–DNA Monomer Protein 1 DNA 2 ;DNA (5'-D(*DTP*DTP*DTP*DTP*DTP*DTP*DTP*DTP*DTP*DTP*DTP*DTP*DTP*DTP*DT)-3') ; × 1 ;DNA (5'-D(*DAP*DAP*DAP*DAP*DAP*DAP*DAP*DAP*DAP*DAP*DAP*DA)-3') ; × 1 MAGNESIUM ION × 5 TETRAFLUOROALUMINATE ION × 5 ADENOSINE-5'-DIPHOSPHATE × 5 Consistent with all polymers

Other States of the Same Protein in the Database

Monomer
1aa3 1rea 2reb 3cmv 3cmv 3cmv 3cmv 3cmv 3cmv 3cmv 3cmv 4twz

12 assemblies

Homodimer

None

Homotetramer

None

Other homooligomers
1n03 1u94 1u98 1u99 1xms 1xmv 2rec

7 assemblies

Heteromeric or nucleic-acid complex
3cmt 3cmt 3cmu 3cmw 3cmw 3cmx 3cmx 8gmu 8trg

9 assemblies

View Construct and Data Evidence
UniProt name RECA_ECOLI
Isoform —
PDB entities 3
Chains and sequence ranges Author chain A； PDBConstruct 5–309； UniProt 31–335 Author chain A； PDBConstruct 325–658； UniProt 2–335 Author chain A； PDBConstruct 674–1007； UniProt 2–335 Author chain A； PDBConstruct 1024–1357； UniProt 2–335 Author chain A； PDBConstruct 1373–1706； UniProt 2–335 Author chain D； PDBConstruct 5–309； UniProt 31–335 Author chain D； PDBConstruct 325–658； UniProt 2–335 Author chain D； PDBConstruct 674–1007； UniProt 2–335 Author chain D； PDBConstruct 1024–1357； UniProt 2–335 Author chain D； PDBConstruct 1373–1706； UniProt 2–335

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_id3cmx
Deposition date deposition_date2008-03-24
Structure title titleMechanism of homologous recombination from the RecA-ssDNA/dsDNA structures
Keywords keywordshomologous recombination, recombination-DNA COMPLEX; recombination/DNA
Experimental Method methodX-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.

3cmx__assembly_1__model_1

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

Download this curve (.dat)

3cmx__assembly_1__model_1 | I(q)

10-2 10-1 106 107 108 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

3cmx__assembly_1__model_1 | P(r) · Pending

The new assembly/model P(r) has not been calculated yet This placeholder does not display legacy data r (Angstrom) P(r)
P(r) will be calculated and displayed separately for the same assembly/model.
Rg（Guinier）41.25 Å
Rg (electron density)41.62 Å
Total Rg41.60 Å
Atom count12719
Residues1626
Excluded volume225920 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 3cmx__assembly_1__model_1 trimeric （3） Success 4.1.3-1-20251215 (887e7ef) View Download
2 1 3cmx__assembly_2__model_1 trimeric （3） 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 (6)

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6. Fold Classification (SCOP + CATH) 20 domains

CATH v4.4 (20 domains)

Domain ID domain_id3cmxA01
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily300 — P-loop containing nucleotide triphosphate hydrolases
Domain ID domain_id3cmxA02
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology250 — Rec A Protein; domain 2
Homologous superfamily homologous superfamily10 — RecA protein, C-terminal domain
Domain ID domain_id3cmxA03
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily300 — P-loop containing nucleotide triphosphate hydrolases
Domain ID domain_id3cmxA04
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology250 — Rec A Protein; domain 2
Homologous superfamily homologous superfamily10 — RecA protein, C-terminal domain
Domain ID domain_id3cmxA05
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily300 — P-loop containing nucleotide triphosphate hydrolases
Domain ID domain_id3cmxA06
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology250 — Rec A Protein; domain 2
Homologous superfamily homologous superfamily10 — RecA protein, C-terminal domain
Domain ID domain_id3cmxA07
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily300 — P-loop containing nucleotide triphosphate hydrolases
Domain ID domain_id3cmxA08
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology250 — Rec A Protein; domain 2
Homologous superfamily homologous superfamily10 — RecA protein, C-terminal domain
Domain ID domain_id3cmxA09
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily300 — P-loop containing nucleotide triphosphate hydrolases
Domain ID domain_id3cmxA10
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology250 — Rec A Protein; domain 2
Homologous superfamily homologous superfamily10 — RecA protein, C-terminal domain
Domain ID domain_id3cmxD01
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily300 — P-loop containing nucleotide triphosphate hydrolases
Domain ID domain_id3cmxD02
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology250 — Rec A Protein; domain 2
Homologous superfamily homologous superfamily10 — RecA protein, C-terminal domain
Domain ID domain_id3cmxD03
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily300 — P-loop containing nucleotide triphosphate hydrolases
Domain ID domain_id3cmxD04
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology250 — Rec A Protein; domain 2
Homologous superfamily homologous superfamily10 — RecA protein, C-terminal domain
Domain ID domain_id3cmxD05
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily300 — P-loop containing nucleotide triphosphate hydrolases
Domain ID domain_id3cmxD06
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology250 — Rec A Protein; domain 2
Homologous superfamily homologous superfamily10 — RecA protein, C-terminal domain
Domain ID domain_id3cmxD07
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily300 — P-loop containing nucleotide triphosphate hydrolases
Domain ID domain_id3cmxD08
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology250 — Rec A Protein; domain 2
Homologous superfamily homologous superfamily10 — RecA protein, C-terminal domain
Domain ID domain_id3cmxD09
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily300 — P-loop containing nucleotide triphosphate hydrolases
Domain ID domain_id3cmxD10
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology250 — Rec A Protein; domain 2
Homologous superfamily homologous superfamily10 — RecA protein, C-terminal domain
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7. Citations (1)