Metagenomic mining and structure-function studies of a hyper-thermostable cellobiohydrolase from hot spring sediment.

Enzymatic breakdown is an attractive cellulose utilisation method with a low environmental load. Its high temperature operation could promote saccharification and lower contamination risk. Here we report a hyper-thermostable cellobiohydrolase (CBH), named HmCel6A and its variant HmCel6A-3SNP that were isolated metagenomically from hot spring sediments and expressed in Escherichia coli.

Identification of the UV-responsive sequence in the human tissue plasminogen activator gene.

Functional analysis of regulatory elements in the human tissue plasminogen activator (tPA) gene showed that its promoter (-119/+169) is activated by UV irradiation in HeLa cells. We demonstrated here that the AP-2 like CCCCACCC sequence is involved in the UV-mediated activation and Sp1 binds to the sequence.