3UO8

Crystal structure of the MALT1 paracaspase (P1 form)

Summary for 3UO8

• Entry DOI: 10.2210/pdb3uo8/pdb
• Related: 3UOA
• Related PRD ID: PRD_001076
• Descriptor: Mucosa-associated lymphoid tissue lymphoma translocation protein 1, Z-Val-Arg-Pro-DL-Arg-fluoromethylketone (3 entities in total)
• Functional Keywords: paracaspase, lymphoma, nf-kb signalling, caspase fold, immunoglobulin fold, hydrolase-hydrolase inhibitor complex, hydrolase/hydrolase inhibitor
• Biological source: Homo sapiens (human); More
• Cellular location: Cytoplasm, perinuclear region: Q9UDY8
• Total number of polymer chains: 4
• Total formula weight: 90258.67

Authors

Jeffrey, P.D.,Yu, J.W.,Shi, Y. (deposition date: 2011-11-16, release date: 2011-12-21, Last modification date: 2024-11-13)

Primary citation

Yu, J.W.,Jeffrey, P.D.,Ha, J.Y.,Yang, X.,Shi, Y.
Crystal structure of the mucosa-associated lymphoid tissue lymphoma translocation 1 (MALT1) paracaspase region.
Proc.Natl.Acad.Sci.USA, 108:21004-21009, 2011

PubMed Abstract: The mucosa-associated lymphoid tissue lymphoma translocation 1 (MALT1) paracaspase, a key component of the Carma1/Bcl10/MALT1 signalosome, is critical for NF-κB signaling in multiple contexts. MALT1 is thought to function as a scaffold and protease to promote signaling; however, the biochemical and structural basis of paracaspase action remains largely unknown. Here we report the 1.75-Å resolution crystal structure of the MALT1 paracaspase region, which contains the paracaspase domain and an ensuing Ig-like domain. The paracaspase and the Ig domains appear as a single folding unit and interact with each other through extensive van der Waals contacts and hydrogen bonds. The paracaspase domain adopts a fold that is nearly identical to that of classic caspases and homodimerizes similarly to form an active protease. Unlike caspases, the active and mature form of the paracaspase domain remains a single uncleaved polypeptide and specifically recognizes the bound peptide inhibitor Val-Arg-Pro-Arg. In particular, the carboxyl-terminal amino acid Arg of the inhibitor is coordinated by three highly conserved acidic residues. This structure serves as an important framework for deciphering the function and mechanism of paracaspases exemplified by MALT1.

PubMed: 22158899
DOI: 10.1073/pnas.1111708108

Experimental method

X-RAY DIFFRACTION (1.9 Å)