Title
Tiki, at the head of a new superfamily of enzymes.
Abstract
Tiki proteins appear to antagonize Wnt signalling pathway by acting as Wnt proteases, thereby affecting Wnt solubility by its amino-terminal cleavage. Tiki1 protease activity was shown to be metal ion-dependent and was inhibited by chelating agents and thus was tentatively proposed to be a metalloprotease. Nevertheless, Tiki proteins exhibit no detectable sequence similarity to previously described metalloproteases, but instead have been reported as being homologues of TraB proteins (Pfam ID: PF01963), a widely distributed family of unknown function and structure. Here, we show that Tiki proteins are members of a new superfamily of domains contained not just in TraB proteins, but also in erythromycin esterase (Pfam ID: PF05139), DUF399 (domain of unknown function 399; Pfam ID: PF04187) and MARTX toxins that contribute to host invasion and pathogenesis by bacteria. We establish the core fold of this enzymatic domain and its catalytic residues.
Year
DOI
Venue
2013
10.1093/bioinformatics/btt412
BIOINFORMATICS
Field
DocType
Volume
Sequence alignment,Wnt signaling pathway,Proteases,Metalloproteinase,Biology,Biochemistry,Domain of unknown function,Hedgehog signaling pathway,Protease,Bioinformatics,Peptide sequence
Journal
29
Issue
ISSN
Citations 
19
1367-4803
0
PageRank 
References 
Authors
0.34
4
2
Name
Order
Citations
PageRank
Luis Sánchez-Pulido123.16
Chris P. Ponting2733283.28