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          Institute: MPI für Entwicklungsbiologie     Collection: Abteilung 1 - Protein Evolution (A. Lupas)     Display Documents



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ID: 460637.0, MPI für Entwicklungsbiologie / Abteilung 1 - Protein Evolution (A. Lupas)
Structure and activity of the N-terminal substrate recognition domains in proteasomal ATPases
Authors:Djuranovic, S.; Hartmann, M. D.; Habeck, M.; Ursinus, A.; Zwickl, P.; Martin, J.; Lupas, A. N.; Zeth, K.
Date of Publication (YYYY-MM-DD):2009-06-12
Title of Journal:Mol Cell
Volume:34
Issue / Number:5
Start Page:580
End Page:590
Review Status:not specified
Audience:Not Specified
Abstract / Description:The proteasome forms the core of the protein quality control system in archaea and eukaryotes and also occurs in one bacterial lineage, the Actinobacteria. Access to its proteolytic compartment is controlled by AAA ATPases, whose N-terminal domains (N domains) are thought to mediate substrate recognition. The N domains of an archaeal proteasomal ATPase, Archaeoglobus fulgidus PAN, and of its actinobacterial homolog, Rhodococcus erythropolis ARC, form hexameric rings, whose subunits consist of an N-terminal coiled coil and a C-terminal OB domain. In ARC-N, the OB domains are duplicated and form separate rings. PAN-N and ARC-N can act as chaperones, preventing the aggregation of heterologous proteins in vitro, and this activity is preserved in various chimeras, even when these include coiled coils and OB domains from unrelated proteins. The structures suggest a molecular mechanism for substrate processing based on concerted radial motions of the coiled coils relative to the OB rings.
Free Keywords:Adenosine Triphosphatases/*chemistry/physiology; Amino Acid Sequence; Archaeal Proteins/*chemistry/physiology; Archaeoglobus fulgidus/*enzymology; Bacterial Proteins/*chemistry/physiology; Computational Biology; Models, Molecular; Molecular Sequence Data; Proteasome Endopeptidase Complex/*chemistry/physiology; Protein Structure, Tertiary; Rhodococcus/*enzymology; Sequence Alignment; Sequence Analysis, Protein; Substrate Specificity
External Publication Status:published
Document Type:Article
Affiliations:MPI für Entwicklungsbiologie/Abteilung 1 - Proteinevolution (Andrei Lupas)
External Affiliations:%G eng
Identifiers:ISSN:1097-4164 (Electronic) 1097-2765 (Linking) %R S109... [ID No:1]
URL:http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=... [ID No:2]
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