Details

Autor(en) / Beteiligte

• Howard, Michael B.
• Ekborg, Nathan A.
• Taylor, Larry E.
• Hutcheson, Steven W.
• Weiner, Ronald M.

Titel

Identification and analysis of polyserine linker domains in prokaryotic proteins with emphasis on the marine bacterium Microbulbifer degradans

Ist Teil von

• Protein science, 2004-05, Vol.13 (5), p.1422-1425

Ort / Verlag

Bristol: Cold Spring Harbor Laboratory Press

Erscheinungsjahr

2004

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• Polyserine linkers (PSLs) are interdomain, serine‐rich sequences found in modular proteins. Though common among eukaryotes, their presence in prokaryotic enzymes is limited. We identified 46 extracellular proteins involved in complex carbohydrate degradation from Microbulbifer degradans that contain PSLs that separate carbohydrate‐binding domains or catalytic domains from other binding domains. In nine M. degradans proteins, PSLs also separated amino‐terminal lipoprotein acylation sites from the remainder of the polypeptide. Furthermore, among the 76 PSL proteins identified in sequence repositories, 65 are annotated as proteins involved in complex carbohydrate degradation. We discuss the notion that PSLs are flexible, disordered spacer regions that enhance substrate accessibility.