6B00

Thermostabilized mutant of human carbonic anhydrase II - A65T L100H K154N L224S L240P A248T


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.9 Å
  • R-Value Free: 0.144 
  • R-Value Work: 0.120 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural insights into a thermostable variant of human carbonic anhydrase II.

Kean, K.M.Porter, J.J.Mehl, R.A.Karplus, P.A.

(2018) Protein Sci. 27: 573-577

  • DOI: 10.1002/pro.3347

  • PubMed Abstract: 
  • Carbonic anhydrase is an enzyme of interest for many biotechnological developments including carbon sequestration. These applications often require harsh conditions, so there is a need for the development of thermostable variants. One of the most the ...

    Carbonic anhydrase is an enzyme of interest for many biotechnological developments including carbon sequestration. These applications often require harsh conditions, so there is a need for the development of thermostable variants. One of the most thermostable human carbonic anhydrase II (HCAIIts) variants was patented in 2006. Here, we report the ultra-high resolution crystal structure of HCAIIts. The structural changes seen are consistent with each of the six mutations involved acting largely independently and variously resulting in increased H-bonding, improved packing, and reduced side chain entropy loss on folding to yield the increased stability. We further suggest that for four of the mutations, improvements in backbone conformational energetics is also a contributor and that considerations of such conformational propensities of individual amino acids are often overlooked.


    Organizational Affiliation

    Department of Biochemistry and Biophysics, 2011 Agriculture and Life Sciences Building, Oregon State University, Corvallis, Oregon, 97331.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Carbonic anhydrase 2
A
266Homo sapiensMutation(s): 6 
Gene Names: CA2
EC: 4.2.1.1
Find proteins for P00918 (Homo sapiens)
Go to Gene View: CA2
Go to UniProtKB:  P00918
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.9 Å
  • R-Value Free: 0.144 
  • R-Value Work: 0.120 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 47.620α = 90.00
b = 43.760β = 100.72
c = 57.990γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHENIXphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-12-13
    Type: Initial release
  • Version 1.1: 2018-01-31
    Type: Database references