ISDA

Entry Detail

PDB ID:

1C3T

Keywords:

DE NOVO PROTEIN

Title:

ROTAMER STRAIN AS A DETERMINANT OF PROTEIN STRUCTURAL SPECIFICITY

Biological Source:

Source Organism:

Homo sapiens

Host Organism:

Escherichia coli BL21

PDB Version:

Deposition Date:

1999-07-28

Release Date:

1999-08-20

Method Details:

Experimental Method:

SOLUTION NMR

Conformers Calculated:

Conformers Submitted:

Selection Criteria:

structures with the lowest energy

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:PROTEIN (1D8 UBIQUITIN)
Mutations:I3L,I13L,L15V,V17L,I23V,V26L,I61L,L67I
Chain IDs:A
Chain Length:76
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:P0CG48 Pfam ID:PF00240

Ligand Molecules

Primary Citation

Rotamer strain as a determinant of protein structural specificity.

Lazar, G.A, Johnson, E.C, Desjarlais, J.R, Handel, T.M, Lazar, G.A, Desjarlais, J.R, Handel, T.M, Johnson, E.C, Lazar, G.A, Desjarlais, J.R, Handel, T.M.Show

Protein Sci. 8 2598 2610 (1999)

PMID: 10631975

Abstact

We present direct evidence for a change in protein structural specificity due to hydrophobic core packing. High resolution structural analysis of a designed core variant of ubiquitin reveals that the protein is in slow exchange between two conformations. Examination of side-chain rotamers indicates that this dynamic response and the lower stability of the protein are coupled to greater strain and mobility in the core. The results suggest that manipulating the level of side-chain strain may be one way of fine tuning the stability and specificity of proteins.

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Primary Citation of related structures