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PDBsum entry 4a3i
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Top Page protein dna_rna metals Protein-protein interface(s) links
Transcription PDB id
4a3i
Contents
Protein chains
1422 a.a.
1115 a.a.
266 a.a.
178 a.a.
214 a.a.
84 a.a.
171 a.a.
133 a.a.
119 a.a.
65 a.a.
115 a.a.
46 a.a.
DNA/RNA
Metals
_MG
_ZN ×8
procheck   Generate full PROCHECK analyses

PROCHECK summary for 4a3i

Ramachandran plot

PROCHECK statistics

1. Ramachandran Plot statistics


                                         No. of
                                        residues     %-tage
                                         ------      ------
Most favoured regions      [A,B,L]         2829       81.5%*  
Additional allowed regions [a,b,l,p]        541       15.6%          
Generously allowed regions [~a,~b,~l,~p]     68        2.0%          
Disallowed regions         [XX]              33        1.0%*  
                                           ----      ------
Non-glycine and non-proline residues       3471      100.0%

End-residues (excl. Gly and Pro)             50

Glycine residues                            237
Proline residues                            171
                                           ----
Total number of residues                   3929

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            -0.58*     
     Chi1-chi2 distribution          -0.82*     
     Chi1 only                       -0.26      
     Chi3 & chi4                      0.41      
     Omega                            0.20      
                                                  -0.24      
                                                  =====
Main-chain covalent forces:-
     Main-chain bond lengths          0.19      
     Main-chain bond angles          -0.24      
                                                  -0.06      
                                                  =====

     OVERALL AVERAGE                              -0.16      
                                                  =====

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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