English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Chromosomal DNA from Actinomyces viscosus was digested with restriction endonucleases and the fragments ligated with pUC-vectors were used to transform Escherichia coli cells. Clones bearing the required sialidase gene were detected by spraying the colonies with the fluorogenic sialidase substrate MU-Neu5Ac. The identity of the cloned sialidase was confirmed after the 5700-fold enrichment and comparison with the purified enzyme of A. viscosus. Both sialidases were identical with regard to molecular mass, substrate specificity tested with sialyllactoses, and the inhibition of their activity by heterologous antisialidase antibodies. The sequenced insert (EMBL accession number X62276) revealed a mol% G + C of 68.2, typical for A. viscosus. An open reading frame of 2739 bp follows a sequence with dyad symmetry and an AG-rich region, and codes for 913 amino acids representing a molecular mass of 113 kDa. The conserved amino acid sequence [Ser-X-Asp-X-Gly-X-Thr-Trp] typical for bacterial sialidases was found at five positions in the predicted amino acid sequence. The gene of this enzyme is expressed by E. coli, despite the low relatedness of both species.

Cloning, Sequencing and Expression of the Sialidase Gene from Actinomyces viscosus DSM 43798