Cited by 12Ubiquitin and proteasome pathwaysEnzyme Structure and FunctionProtein Structure and Dynamics

Crystal Structure of Human ASB9-2 and Substrate-Recognition of CKB

Fei, Xiangwei, Gu, Xing, Fan, Shilong, Yang, Zhenxing, Li, Fan, Zhang, Cheng, Gong, Weimin, Mao, Yumin +1 more·2012·The Protein Journal

Abstract

Human ankyrin repeat and suppressor of cytokine signaling box protein 9 (hASB9) is a specific substrate-recognition subunit of an elongin C-cullin-SOCS box E3 ubiquitin ligase complex. It recognizes its substrate, brain type creatine kinase (CKB), using the ankyrin repeat domain; and facilitates the polyubiquitination of CKB to mediate proteasomal degradation through the SOCS box domain. HASB9-2 is an isoform of hASB9 that contains one ankyrin repeat domain. In this study, the crystal structure of hASB9-2 is shown at 2.2-Å resolution using molecular replacement. Overall, hASB9-2 forms a slightly curved arch with a characteristic L-shaped cross-section. Amino acid substitution analysis based on docking experiments revealed that His103 and Phe107 in hASB9-2 are essential for binding to CKB. Analysis of truncation mutants demonstrated that the first six ankyrin repeats along with the N-terminal region of hASB9-2 contribute to the interaction with CKB.

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Crossref · 10.1007/s10930-012-9401-1

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  • Structural data for ASB9 reveal juxtaposed hydrophobic cavities in the substrate-binding domain.

    “structural data for ASB9 reveal juxtaposed hydrophobic cavities in the substrate-binding domain”

    From Targeted protein degradation: expanding the toolbox (2019) · cites this paper as [106]

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Authors
Fei, X., Gu, X., Fan, S., Yang, Z., Li, F., Zhang, C., Gong, W., Mao, Y., & Ji, C.
Affiliations
  • Fudan University (CN)
  • Chinese Academy of Sciences (CN)
Corresponding author
Ji, Chaoneng
Venue
The Protein Journal
Published
2012-03-15
Volume
31
Issue
4
Pages
275-284
ISSN
  • 1572-3887 (ISSN-L)
  • 1875-8355
OpenAlex
W2031468303
Cited by
12
References
29
Citations by year
2024: 1 · 2023: 1 · 2019: 2 · 2018: 2 · 2016: 3 · 2015: 1 · 2013: 2
FWCI
0.39
Type
journal article
Language
en
Open access
closed
Locations
  • The Protein Journal (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Physical Sciences › Materials Science › Materials Chemistry › Enzyme Structure and Function
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
Keywords
ankyrin repeat domain, brain-type creatine kinase, substrate recognition, polyubiquitination, proteasomal degradation, protein-protein interaction, crystal structure, truncation mutants
MeSH terms
Amino Acid Sequence, Binding Sites, Humans, Kinetics, Models, Molecular, Molecular Sequence Data, Protein Binding, Substrate Specificity, Sequence Alignment, Ankyrin Repeat, Crystallography, X-Ray, Suppressor of Cytokine Signaling Proteins, Creatine Kinase, BB Form

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