5HG2 image
Deposition Date 2016-01-07
Release Date 2016-02-24
Last Version Date 2023-11-15
Entry Detail
PDB ID:
5HG2
Keywords:
DE NOVO PROTEIN
Title:
Backbone Modifications in the Protein GB1 Helix: beta-3-Ala24, beta-3-Lys28, beta-3-Lys31, beta-2-Asn35
Biological Source:
Source Organism:
Streptococcus sp. group G (Taxon ID: 1320)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.80 Å
R-Value Free:
0.21
R-Value Work:
0.19
R-Value Observed:
0.20
Space Group:
P 41
5HG2 validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Immunoglobulin G-binding protein G
Gene (Uniprot):spg
Chain IDs:A, B, C, D
Chain Length:57
Number of Molecules:4
Biological Source:Streptococcus sp. group G
UniProt ID:P19909 Pfam ID:PF01378
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
B3A A ALA modified residue
B3K A LYS modified residue
Ligand Molecules
GOL
MG
Primary Citation
Comparison of design strategies for alpha-helix backbone modification in a protein tertiary fold.
Chem.Commun.(Camb.) 52 3789 3792 (2016)
PMID: 26853882 DOI: 10.1039/c6cc00273k

Abstact

We report here the comparison of five classes of unnatural amino acid building blocks for their ability to be accommodated into an α-helix in a protein tertiary fold context. High-resolution structural characterization and analysis of folding thermodynamics yield new insights into the relationship between backbone composition and folding energetics in α-helix mimetics and suggest refined design rules for engineering the backbones of natural sequences.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
5HFY
5HI1