3WOO

Crystal structure of the DAP BII hexapeptide complex I


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.184 

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Literature

S46 peptidases are the first exopeptidases to be members of clan PA

Sakamoto, Y.Suzuki, Y.Iizuka, I.Tateoka, C.Roppongi, S.Fujimoto, M.Inaka, K.Tanaka, H.Masaki, M.Ohta, K.Okada, H.Nonaka, T.Morikawa, Y.Nakamura, K.T.Ogasawara, W.Tanaka, N.

(2014) Sci Rep 4: 4977-4977

  • DOI: 10.1038/srep04977
  • Primary Citation of Related Structures:  
    3WOI, 3WOJ, 3WOK, 3WOL, 3WOM, 3WON, 3WOO, 3WOP, 3WOQ, 3WOR

  • PubMed Abstract: 
  • The dipeptidyl aminopeptidase BII (DAP BII) belongs to a serine peptidase family, S46. The amino acid sequence of the catalytic unit of DAP BII exhibits significant similarity to those of clan PA endopeptidases, such as chymotrypsin. However, the mol ...

    The dipeptidyl aminopeptidase BII (DAP BII) belongs to a serine peptidase family, S46. The amino acid sequence of the catalytic unit of DAP BII exhibits significant similarity to those of clan PA endopeptidases, such as chymotrypsin. However, the molecular mechanism of the exopeptidase activity of family S46 peptidase is unknown. Here, we report crystal structures of DAP BII. DAP BII contains a peptidase domain including a typical double β-barrel fold and previously unreported α-helical domain. The structures of peptide complexes revealed that the α-helical domain covers the active-site cleft and the side chain of Asn330 in the domain forms hydrogen bonds with the N-terminus of the bound peptide. These observations indicate that the α-helical domain regulates the exopeptidase activity of DAP BII. Because S46 peptidases are not found in mammals, we expect that our study will be useful for the design of specific inhibitors of S46 peptidases from pathogens.


    Organizational Affiliation

    School of Pharmacy, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, JAPAN.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
dipeptidyl aminopeptidase BIIAB698Pseudoxanthomonas mexicanaMutation(s): 1 
Gene Names: dapb2
EC: 3.4.14
Find proteins for V5YM14 (Pseudoxanthomonas mexicana)
Explore V5YM14 
Go to UniProtKB:  V5YM14
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Angiotensin IICD6Homo sapiensMutation(s): 0 
Gene Names: AGTSERPINA8
Find proteins for P01019 (Homo sapiens)
Explore P01019 
Go to UniProtKB:  P01019
NIH Common Fund Data Resources
PHAROS  P01019
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.184 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 121.7α = 90
b = 121.7β = 90
c = 218.97γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-09-03
    Type: Initial release