1XSL

Crystal Structure of human DNA polymerase lambda in complex with a one nucleotide DNA gap

• PDB DOI: https://doi.org/10.2210/pdb1XSL/pdb
• NAKB: 1XSL

• Classification: TRANSFERASE/DNA
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2004-10-19 Released: 2005-01-18 
• Deposition Author(s): Garcia-Diaz, M., Bebenek, K., Krahn, J.M., Kunkel, T.A., Pedersen, L.C.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.252 
• R-Value Work: 0.207 
• R-Value Observed: 0.207 

Literature

A closed conformation for the Pol lambda catalytic cycle.

Garcia-Diaz, M., Bebenek, K., Krahn, J.M., Kunkel, T.A., Pedersen, L.C.

(2005) Nat Struct Mol Biol 12: 97-98

• PubMed: 15608652 
• DOI: https://doi.org/10.1038/nsmb876
• Primary Citation of Related Structures:  
  1XSL, 1XSN, 1XSP


• PubMed Abstract: 
  

  Pol lambda is a family X member believed to fill short gaps during DNA repair. Here we report crystal structures of Pol lambda representing three steps in filling a single-nucleotide gap. These structures indicate that, unlike other DNA polymerases, Pol lambda does not undergo large subdomain movements during catalysis, and they provide a clear characterization of the geometry and stereochemistry of the in-line nucleotidyl transfer reaction.

---

Organizational Affiliation: 

Laboratory of Structural Biology, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina 27709, USA.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors.

Biological Assembly 3  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 3 assigned by authors.

Biological Assembly 4  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 4 assigned by authors.

Macromolecule Content

• Total Structure Weight: 175.71 kDa 
• Atom Count: 12,778 
• Modelled Residue Count: 1,389 
• Deposited Residue Count: 1,424 
• Unique protein chains: 1
• Unique nucleic acid chains: 3

Macromolecules

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
DNA polymerase lambda	M [auth A], N [auth E], O [auth I], P [auth M]	335	Homo sapiens	Mutation(s): 0  Gene Names: POLL EC: 2.7.7.7 (PDB Primary Data), 4.2.99 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UGP5 (Homo sapiens) Explore Q9UGP5  Go to UniProtKB:  Q9UGP5
PHAROS:  Q9UGP5 GTEx:  ENSG00000166169

Entity ID: 1
Molecule	Chains	Length	Organism	Image
5'-D(*CP*GP*GP*CP*AP*GP*CP*GP*CP*AP*C)-3'	A [auth B], D [auth F], G [auth J], J [auth N]	11	N/A

Entity ID: 2
Molecule	Chains	Length	Organism	Image
5'-D(*GP*TP*GP*CP*GP*C)-3'	B [auth C], E [auth G], H [auth K], K [auth O]	6	N/A

Entity ID: 3
Molecule	Chains	Length	Organism	Image
5'-D(P*GP*CP*CP*G)-3'	C [auth D], F [auth H], I [auth L], L [auth P]	4	N/A

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CAC	R [auth D]	CACODYLATE ION C2 H6 As O2 OGGXGZAMXPVRFZ-UHFFFAOYSA-M
MG	Q [auth B], S [auth F], T [auth H]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N
NA	U [auth J], V [auth N], W [auth A], X [auth E], Y [auth I], Z [auth M]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.252 
• R-Value Work: 0.207 
• R-Value Observed: 0.207 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 191.504	α = 90
b = 98.812	β = 90
c = 104.519	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2005-01-18 
Deposition Author(s): Garcia-Diaz, M., Bebenek, K., Krahn, J.M., Kunkel, T.A., Pedersen, L.C.

Revision History  

• Version 1.0: 2005-01-18
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Non-polymer description, Version format compliance
• Version 1.3: 2018-01-24
  Changes: Database references