4RGY

Structural and functional analysis of a low-temperature-active alkaline esterase from South China Sea marine sediment microbial metagenomic library

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.181 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.176 

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This is version 1.2 of the entry. See complete history. 


Literature

Structural and functional analysis of a low-temperature-active alkaline esterase from South China Sea marine sediment microbial metagenomic library.

Hu, Y., Liu, Y., Li, J., Feng, Y., Lu, N., Zhu, B., Xue, S.

(2015) J Ind Microbiol Biotechnol 42: 1449-1461

  • DOI: 10.1007/s10295-015-1653-2
  • Primary Citation of Related Structures:  
    4RGY

  • PubMed Abstract: 

    • A low-temperature-active alkaline esterase, Est12, from a marine sediment metagenomic fosmid library was identified. Est12 prefers short- and middle-chain p-nitrophenol esters as substrate with optimum temperature and pH value of 50 °C and 9.0, respectively, and nearly 50 % of maximum activity retained at 5 °C ...

    A low-temperature-active alkaline esterase, Est12, from a marine sediment metagenomic fosmid library was identified. Est12 prefers short- and middle-chain p-nitrophenol esters as substrate with optimum temperature and pH value of 50 °C and 9.0, respectively, and nearly 50 % of maximum activity retained at 5 °C. The hydrolysis activity of Est12 was stable at 40 °C. Ca(2+) especially activated the activity of Est12 to about 151 % of the control. DEPC and PMSF inhibited the activity of Est12 to 34 and 25 %, respectively. In addition, Est12 was more tolerable to methanol compared to other organic solvents tested. The crystal structure of Est12 at 1.39 Å resolution showed that the cap domain which is composed of an α-helix and a flexible region resulted in a relatively wide spectrum of substrate, with p-nitrophenol caproate as the preferred one. Furthermore, the flexible cap domain and the high percentage of Gly, Ser, and Met may play important roles in the adaptation of Est12 to low temperature.

    Organizational Affiliation: 

    Marine Bioengineering Group, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China. xuesong@dicp.ac.cn.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
EsteraseA, B271uncultured bacterium FLS12Mutation(s): 0 
UniProt
Find proteins for B8Y562 (uncultured bacterium FLS12)
Explore B8Y562 
Go to UniProtKB:  B8Y562
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupB8Y562
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.181 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.176 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 133.459α = 90
b = 63.767β = 127.11
c = 88.688γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2014-10-01 
  • Released Date: 2015-09-16 
    • Deposition Author(s): Liu, Y.

Revision History  (Full details and data files)

  • Version 1.0: 2015-09-16
    Type: Initial release
  • Version 1.1: 2015-09-23
    Changes: Database references
  • Version 1.2: 2015-10-28
    Changes: Database references