Conserved structural features and sequence patterns in the GroES fold family.
An irregular, all beta-class of proteins, comprising members of the chaperonin-10, quinone oxidoreductase, glucose dehydrogenase and alcohol dehydrogenase families has earlier been classified as the GroES fold. In this communication, we present an extensive analysis of sequences and three dimensional structures of proteins belonging to this family. The individual protein structures can be superposed within 1.6 A for more than 60 structurally equivalent residues. The comparisons show a highly conserved hydrophobic core and conservation of a few key residues. A glycyl-aspartate dipeptide is suggested as being critical for the maintenance of the GroES fold. One of the surprising findings of the study is the non-conservative nature of Ile to Leu mutations in the protein core, although Ile to Val mutations are found to occur frequently.
Taneja
B
B
Institute of Microbial Technology, Sector 39-A, Chandigarh 160 036, India.
Mande
S C
SC
D000426:Alcohol Dehydrogenase / Q000737:chemistry; D000595:Amino Acid Sequence; D018835:Chaperonin 10 / Q000737:chemistry*; D017124:Conserved Sequence / Q000502:physiology*; D005948:Glucose Dehydrogenases / Q000737:chemistry; D008958:Models, Molecular; D008969:Molecular Sequence Data; D009154:Mutation; D010088:Oxidoreductases / Q000737:chemistry; D017510:Protein Folding; D017434:Protein Structure, Tertiary; D011506:Proteins / Q000737:chemistry* / Q000235:genetics; D017386:Sequence Homology, Amino Acid; D013329:Structure-Activity Relationship
D018835:Chaperonin 10; D011506:Proteins; D010088:Oxidoreductases; D005948:Glucose Dehydrogenases; D000426:Alcohol Dehydrogenase