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Periplasmic pH-dependent serine endoprotease DegQ - P39099 (DEGQ_ECOLI)

 

Protein Feature View of PDB entries mapped to a UniProtKB sequence  

Number of PDB entries for P39099: 6
 
Function
DegQ could degrade transiently denatured and unfolded proteins which accumulate in the periplasm following stress conditions. DegQ is efficient with Val-Xaa and Ile-Xaa peptide bonds, suggesting a preference for a beta-branched side chain amino acids. Only unfolded proteins devoid of disulfide bonds appear capable to be cleaved, thereby preventing non-specific proteolysis of folded proteins. DegQ can substitute for the periplasmic protease DegP. (data source: UniProt  )
Subunit structure
DegQ can reversibly switch between different oligomeric forms that represent inactive (6-mer) and active (12-and 24-mer) protease states. Substrate binding triggers the conversion of the resting DegQ trimer and hexamer into catalytically active 12- and 24-mers. The conversion of 6-mer (DegQ6) into 12-mer (DegQ12) or 24-mer (DegQ24) is crucial in regulating protease activity. (data source: UniProt  )
UniProtKB:
Species: 
Gene names: degQ hhoA b3234 JW3203
Length:
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Data origin/color codes
The vertical color bar on the left side indicates data provenance.
Data in green originates from UniProtKB  
Data in yellow originates from Pfam  , by interacting with the HMMER3 web site  
Data in orange originates from the SCOP   (version 1.75) and SCOPe   (version 2.04) classifications.
Data in grey has been calculated using BioJava  . Protein disorder predictions are based on JRONN (Troshin, P. and Barton, G. J. unpublished), a Java implementation of RONN  
  • Red: potentially disorderd region
  • Blue: probably ordered region.
Hydropathy has been calculated using a sliding window of 15 residues and summing up scores from standard hydrophobicity tables.
  • Red: hydrophobic
  • Blue: hydrophilic.
Data in lilac represent the genomic exon structure projected onto the UniProt sequence.
Data in blue originates from PDB
  • Secstruc: Secondary structure projected from representative PDB entries onto the UniProt sequence.
Data in red indicates combined ranges of Homology Models from SBKB   and the Protein Model Portal  

The PDB to UniProt mapping is based on the data provided by the EBI SIFTS project. See also Velankar et al., Nucleic Acids Research 33, D262-265 (2005).