Macromolecule Content

• Total Structure Weight: 19.33 kDa 
• Atom Count: 1283 
• Residue Count: 166 
• Unique protein chains: 1

1XWN

solution structure of cyclophilin like 1(PPIL1) and insights into its interaction with SKIP

• DOI: 10.2210/pdb1XWN/pdb

• Classification: ISOMERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2004-11-01 Released: 2005-10-18 
• Deposition Author(s): Xu, C., Xu, Y., Tang, Y., Wu, J., Shi, Y., Huang, Q., Zhang, Q.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Solution structure of human peptidyl prolyl isomerase like protein 1 and insights into its interaction with SKIP

Xu, C., Zhang, J., Huang, X., Sun, J., Xu, Y., Tang, Y., Wu, J., Shi, Y., Huang, Q., Zhang, Q.

(2006) J Biol Chem 281: 15900-15908

• PubMed: 16595688 
• DOI: 10.1074/jbc.M511155200
• Primary Citation of Related Structures:  
  1XWN


• PubMed Abstract: 
  

The human PPIL1 (peptidyl prolyl isomerase-like protein 1) is a specific component of human 35 S U5 small nuclear ribonucleoprotein particle and 45 S activated spliceosome. It is recruited by SKIP, another essential component of 45 S activated spliceosome, into spliceosome just before the catalytic step 1. It stably associates with SKIP, which also exists in 35 S and activated spliceosome as a nuclear matrix protein. We report here the solution structure of PPIL1 determined by NMR spectroscopy. The structure of PPIL1 resembles other members of the cyclophilin family and exhibits PPIase activity. To investigate its interaction with SKIP in vitro, we identified the SKIP contact region by GST pulldown experiments and surface plasmon resonance. We provide direct evidence of PPIL1 stably associated with SKIP. The dissociation constant is 1.25 x 10(-7) M for the N-terminal peptide of SKIP-(59-129) with PPIL1. We also used chemical shift perturbation experiments to show the possible SKIP binding interface on PPIL1. These results illustrated that a novel cyclophilin-protein contact mode exists in the PPIL1-SKIP complex during activation of the spliceosome. The biological implication of this binding with spliceosome rearrangement during activation is discussed.

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Organizational Affiliation: 

Hefei National Laboratory for Physical Sciences at Microscale and School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, 230026, China.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Peptidyl-prolyl cis-trans isomerase like 1	A	174	Homo sapiens	Mutation(s): 0  Gene Names: PPIL1, CYPL1, CGI-124, UNQ2425/PRO4984 EC: 5.2.1.8
Find proteins for Q9Y3C6 (Homo sapiens) Explore Q9Y3C6  Go to UniProtKB:  Q9Y3C6
NIH Common Fund Data Resources
PHAROS:  Q9Y3C6 GTEx:  ENSG00000137168

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 1XWN Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-11-01 
• Released Date: 2005-10-18 
Deposition Author(s): Xu, C., Xu, Y., Tang, Y., Wu, J., Shi, Y., Huang, Q., Zhang, Q.

Revision History 

• Version 1.0: 2005-10-18
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance