Tolerance of a protein helix to multiple alanine and valine substitutions.

Abstract

Protein stability is influenced by the intrinsic secondary structure propensities of the amino acids and by tertiary interactions, but which of these factors dominates is not known in most cases. We have used combinatorial mutagenesis to examine the effects of substituting a good helix-forming residue (alanine) and a poor helix-forming residue (valine) at many positions in an alpha helix of a native protein. This has allowed us to average over many molecular environments and assess to what extent the results reflect intrinsic helical propensities or are masked by tertiary effects. Study holds ProTherm entries: 3167, 3168, 3169, 3170, 3171, 3172, 3173, 3174, 3175, 3176, 3177, 3178, 3179 Extra Details: combinatorial mutagenesis; helix propensity; protein stability;,secondary structure

Submission Details

ID: U2zsbibW4

Submitter: Connie Wang

Submission Date: April 24, 2018, 8:21 p.m.

Version: 1

Publication Details
Gregoret LM;Sauer RT,Fold Des (1998) Tolerance of a protein helix to multiple alanine and valine substitutions. PMID:9565756
Additional Information

Study Summary

Number of data points 26
Proteins Repressor protein cI ; Repressor protein cI
Unique complexes 13
Assays/Quantities/Protocols Experimental Assay: Tm ; Derived Quantity: dTm
Libraries Mutations for sequence STKKKPLTQEQLEDARRLKAIYEKKKNELGLSQESVADKMGMGQSGVGALFNGINALNAYNAALLAKILKVSVEEFSPSIAREIYEMYEAVS

Structure view and single mutant data analysis

Study data

No weblogo for data of varying length.
Colors: D E R H K S T N Q A V I L M F Y W C G P
 

Data Distribution

Studies with similar sequences (approximate matches)

Correlation with other assays (exact sequence matches)


Relevant UniProtKB Entries

Percent Identity Matching Chains Protein Accession Entry Name
100.0 Repressor protein cI P03034 RPC1_LAMBD