scholarly journals Structure and catalysis by carbonic anhydrase II: Role of active-site tryptophan 5

2011 ◽  
Vol 516 (2) ◽  
pp. 97-102 ◽  
Author(s):  
Rose Mikulski ◽  
John F. Domsic ◽  
George Ling ◽  
Chingkuang Tu ◽  
Arthur H. Robbins ◽  
...  
Keyword(s):  
Carbonic Anhydrase ◽  
Active Site ◽  
Carbonic Anhydrase Ii

scholarly journals Importance of C-Terminal Knot Structure in Carbonic Anhydrase II (Part I): Role of C-Terminal Knot Forming GLN253 on Enzymatic Property of Human Carbinic II

1970 ◽  
Vol 14 ◽  
pp. 1-9
Author(s):  
Mohammad Taufiq Alam
Keyword(s):  
Amino Acid ◽  
Carbonic Anhydrase ◽  
Point Mutation ◽  
Amino Acid Residue ◽  
Active Site ◽  
Terminal Region ◽  
Carbonic Anhydrase Ii ◽  
C Terminus ◽  
Human Carbonic Anhydrase

In both, bovine and human carbonic anhydrase II, a conserved glutamine residue occupies the position in the middle of the knot, which is formed by intercrossing of C-terminal end with N-terminal region. Previous studies have indicated that C-terminus is not the part of an active site, but truncation of 7 amino acid residue in this region can have marked effects on stability of the enzyme (data not published). To gain further insight into the role of specific amino acid residue in C-terminal region, site directed mutagenesis was used to introduce point mutation. Substitution of glutamine with cysteine was chosen because the cysteine residue is less hydrophilic as compared with glutamine and thus, may disrupt the hydrophilic environment in this region. Result indicates that Gln253 located within the C-terminus knot topology plays a significant role in normal function of the enzyme. Thus, C-terminal region might mediate cooperativity between the central active site of the enzyme through proper formation of knot. Key words: Human carbonic anhydrase II; knot topology; point mutation J. bio-sci. 14: 1-9, 2006

scholarly journals Kinetic and crystallographic studies of the role of tyrosine 7 in the active site of human carbonic anhydrase II

2011 ◽  
Vol 506 (2) ◽  
pp. 181-187 ◽  
Author(s):  
Rose Mikulski ◽  
Balendu Sankara Avvaru ◽  
Chingkuang Tu ◽  
Nicolette Case ◽  
Robert McKenna ◽  
...  
Keyword(s):  
Carbonic Anhydrase ◽  
Active Site ◽  
Carbonic Anhydrase Ii ◽  
Human Carbonic Anhydrase

Role of histidine 64 in the catalytic mechanism of human carbonic anhydrase II studied with a site-specific mutant

Biochemistry ◽  
1989 ◽  
Vol 28 (19) ◽  
pp. 7913-7918 ◽  
Author(s):  
Chingkuang Tu ◽  
David N. Silverman ◽  
Cecilia Forsman ◽  
Bengt Harald Jonsson ◽  
Sven Lindskog
Keyword(s):  
Carbonic Anhydrase ◽  
Catalytic Mechanism ◽  
Carbonic Anhydrase Ii ◽  
Site Specific ◽  
Human Carbonic Anhydrase ◽  
A Site

Activation of carbonic anhydrase II by active-site incorporation of histidine analogs

2004 ◽  
Vol 421 (2) ◽  
pp. 283-289 ◽  
Author(s):  
Ileana Elder ◽  
Shoufa Han ◽  
Chingkuang Tu ◽  
Heather Steele ◽  
Philip J. Laipis ◽  
...  
Keyword(s):  
Carbonic Anhydrase ◽  
Active Site ◽  
Carbonic Anhydrase Ii

Out of the active site binding pocket for carbonic anhydrase inhibitors

2015 ◽  
Vol 51 (2) ◽  
pp. 302-305 ◽  
Author(s):  
Katia D'Ambrosio ◽  
Simone Carradori ◽  
Simona M. Monti ◽  
Martina Buonanno ◽  
Daniela Secci ◽  
...  
Keyword(s):  
Carbonic Anhydrase ◽  
Active Site ◽  
Binding Pocket ◽  
Carbonic Anhydrase Ii ◽  
Carbonic Anhydrase Inhibitors ◽  
Human Carbonic Anhydrase ◽  
Site Binding

2-Benzylsulfinylbenzoic acid binds to human carbonic anhydrase II in a mode completely different from any other class of carbonic anhydrase inhibitors investigated so far.

scholarly journals Effect of Active-site Mutation at Asn67 on the Proton Transfer Mechanism of Human Carbonic Anhydrase II

Biochemistry ◽  
2009 ◽  
Vol 48 (33) ◽  
pp. 7996-8005 ◽  
Author(s):  
C. Mark Maupin ◽  
Jiayin Zheng ◽  
Chingkuang Tu ◽  
Robert McKenna ◽  
David N. Silverman ◽  
...  
Keyword(s):  
Carbonic Anhydrase ◽  
Proton Transfer ◽  
Active Site ◽  
Transfer Mechanism ◽  
Carbonic Anhydrase Ii ◽  
Site Mutation ◽  
Human Carbonic Anhydrase
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