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PDBsum entry 3gtk
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Top Page protein dna_rna metals Protein-protein interface(s) links
Transcription, transferase/DNA-RNA hybri PDB id
3gtk
Contents
Protein chains
1442 a.a.
1153 a.a.
271 a.a.
215 a.a.
85 a.a.
136 a.a.
119 a.a.
65 a.a.
114 a.a.
46 a.a.
DNA/RNA
Metals
_ZN ×8
procheck   Generate full PROCHECK analyses

PROCHECK summary for 3gtk

Ramachandran plot

PROCHECK statistics

1. Ramachandran Plot statistics


                                         No. of
                                        residues     %-tage
                                         ------      ------
Most favoured regions      [A,B,L]         2293       70.8%** 
Additional allowed regions [a,b,l,p]        825       25.5%          
Generously allowed regions [~a,~b,~l,~p]     71        2.2%          
Disallowed regions         [XX]              49        1.5%*  
                                           ----      ------
Non-glycine and non-proline residues       3238      100.0%

End-residues (excl. Gly and Pro)             28

Glycine residues                            219
Proline residues                            161
                                           ----
Total number of residues                   3646

Based on an analysis of 118 structures of resolution of at least 2.0 Angstroms and R-factor no greater than 20.0 a good quality model would be expected to have over 90% in the most favoured regions [A,B,L].

2. G-Factors

                                                Average
Parameter                            Score       Score
---------                            -----       -----
Dihedral angles:-
     Phi-psi distribution            -1.01**
     Chi1-chi2 distribution          -0.67*     
     Chi1 only                       -0.29      
     Chi3 & chi4                      0.40      
     Omega                           -0.49      
                                                  -0.56*     
                                                  =====
Main-chain covalent forces:-
     Main-chain bond lengths          0.52      
     Main-chain bond angles           0.34      
                                                   0.41      
                                                  =====

     OVERALL AVERAGE                              -0.18      
                                                  =====

G-factors provide a measure of how unusual, or out-of-the-ordinary, a property is. 

Values below -0.5*  - unusual
Values below -1.0** - highly unusual
Important note: The main-chain bond-lengths and bond angles are compared with the Engh & Huber (1991) ideal values derived from small-molecule data. Therefore, structures refined using different restraints may show apparently large deviations from normality.

 

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