Peptide-N-glycanases and DNA repair proteins, Xp-C/Rad4, are, respectively, active and inactivated enzymes sharing a common transglutaminase fold

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Peptide-N-glycanases and DNA repair proteins, Xp-C/Rad4, are, respectively, active and inactivated enzymes sharing a common transglutaminase fold.

Yeast RAD4, its human ortholog Xp-C and their orthologs in other eukaryotes are DNA repair proteins which participate in nucleotide excision repair through a ubiquitin-dependent process. However, no conserved globular domains that might have shed light on their origin or functions have been reported for these proteins. By using sequence profile analysis, we show that RAD4/Xp-C proteins contain ...

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The structure of Clostridium thermocellum endoglucanase CelC, a member of the largest cellulase family (family A), has been determined at 2.15 A resolution. The protein folds into an (alpha/beta)8 barrel, with a deep active-site cleft generated by the insertion of a helical subdomain. The structure of the catalytic core of xylanase XynZ, which belongs to xylanase family F, has been determined a...

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Nonplanar peptide bonds in proteins are common and conserved but not biased toward active sites.

The planarity of peptide bonds is an assumption that underlies decades of theoretical modeling of proteins. Peptide bonds strongly deviating from planarity are considered very rare features of protein structure that occur for functional reasons. Here, empirical analyses of atomic-resolution protein structures reveal that trans peptide groups can vary by more than 25° from planarity and that the...

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DNA-repair enzymes.

Recent crystallographic studies of DNA-repair enzymes have provided the structural basis for the recognition of damaged DNA. The results imply that flipping out of the base is a common and crucial event in DNA repair. Two classes of repair enzymes that recognize distinct types of damage may exist. DNA-repair enzymes that share similar folds and DNA binding motifs have been proposed to belong to...

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Endogenous DNA Damage and Repair Enzymes

Tomas Lindahl completed his medical studies at Karolinska Institute in 1970. Yet, his work has always been dedicated to unraveling fundamental mechanisms of DNA decay and DNA repair. His research is characterized with groundbreaking discoveries on the instability of our genome, the identification of novel DNA repair activities, the characterization of DNA repair pathways, and the association to...

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ژورنال

عنوان ژورنال: Human Molecular Genetics

سال: 2001

ISSN: 1460-2083

DOI: 10.1093/hmg/10.16.1627