1MTL

Non-productive MUG-DNA complex

• PDB DOI: https://doi.org/10.2210/pdb1MTL/pdb
• NAKB: 1MTL

• Classification: HYDROLASE/DNA
• Organism(s): Escherichia coli
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2002-09-21 Released: 2002-09-27 
• Deposition Author(s): Barrett, T.E., Savva, R., Barlow, T., Brown, T., Jiricny, J., Pearl, L.H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.286 
• R-Value Work: 0.206 
• R-Value Observed: 0.275 

Literature

Structure of a DNA base-excision product resembling a cisplatin inter-strand adduct.

Barrett, T.E., Savva, R., Barlow, T., Brown, T., Jiricny, J., Pearl, L.H.

(1998) Nat Struct Biol 5: 697-701

• PubMed: 9699633 
• DOI: https://doi.org/10.1038/1394
• Primary Citation of Related Structures:  
  1MTL


• PubMed Abstract: 
  

  Base-excision of a self-complementary oligonucleotide with central G:T mismatches by the G:T/U-specific mismatch DNA glycosylase (MUG), generates an unusual DNA structure which is remarkably similar in conformation to an interstrand DNA adduct of the anti-tumor drug cis-diamminedichloroplatinum. The abasic sugars generated by excision of the mismatched thymines are extruded from the double-helix, and the 'widowed' deoxyguanosines rotate so that their N7 and O6 groups protrude into the minor groove of the duplex and restack in an interleaved intercalative geometry, generating a kink in the helix axis.

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Organizational Affiliation: 

Department of Biochemistry and Molecular Biology, University College London, UK.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 44.54 kDa 
• Atom Count: 3,028 
• Modelled Residue Count: 341 
• Deposited Residue Count: 360 
• Unique protein chains: 1
• Unique nucleic acid chains: 1

Macromolecules

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
G/U mismatch-specific DNA glycosylase	C [auth A], D [auth B]	168	Escherichia coli	Mutation(s): 0  Gene Names: MUG EC: 3.2.2
UniProt
Find proteins for P0A9H1 (Escherichia coli (strain K12)) Explore P0A9H1  Go to UniProtKB:  P0A9H1

Entity ID: 1
Molecule	Chains	Length	Organism	Image
5'-D(*CP*GP*CP*GP*AP*GP*(AAB)P*TP*CP*GP*CP*G)-3'	A [auth C], B [auth D]	12	N/A

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.286 
• R-Value Work: 0.206 
• R-Value Observed: 0.275 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 67.62	α = 90
b = 84.86	β = 90
c = 97.58	γ = 90

Software Package:

Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
AMoRE	phasing
X-PLOR	refinement
CCP4	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2002-09-27 
Deposition Author(s): Barrett, T.E., Savva, R., Barlow, T., Brown, T., Jiricny, J., Pearl, L.H.

Revision History  

• Version 1.0: 2002-09-27
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2014-07-09
  Changes: Non-polymer description
• Version 1.4: 2017-10-11
  Changes: Refinement description
• Version 1.5: 2024-02-14
  Changes: Data collection, Database references, Derived calculations
• Version 1.6: 2024-04-03
  Changes: Refinement description