The amino-acid sequence around the active site cysteine and histidine residues of stem-bromelain

1968 ◽  
pp. 1387 ◽  
Author(s):  
S. S. Husain ◽  
G. Lowe
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Active Site ◽  
Histidine Residues ◽  
Active Site Cysteine ◽  
Stem Bromelain

scholarly journals The amino acid sequence around the active-site cysteine and histidine residues of stem bromelain

1970 ◽  
Vol 117 (2) ◽  
pp. 341-346 ◽  
Author(s):  
S. S. Husain ◽  
G. Lowe
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Sodium Borohydride ◽  
Active Site ◽  
Iodoacetic Acid ◽  
Amino Acid Sequences ◽  
Histidine Residues ◽  
Active Site Cysteine ◽  
Stem Bromelain ◽  
High Degree

Stem bromelain that had been irreversibly inhibited with 1,3-dibromo[2-14C]-acetone was reduced with sodium borohydride and carboxymethylated with iodoacetic acid. After digestion with trypsin and α-chymotrypsin three radioactive peptides were isolated chromatographically. The amino acid sequences around the cross-linked cysteine and histidine residues were determined and showed a high degree of homology with those around the active-site cysteine and histidine residues of papain and ficin.

scholarly journals The amino acid sequence around the active-site cysteine and histidine residues, and the buried cysteine residues in ficin

1970 ◽  
Vol 117 (2) ◽  
pp. 333-340 ◽  
Author(s):  
S. S. Husain ◽  
G. Lowe
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Active Site ◽  
Cysteine Residue ◽  
Amino Acid Sequences ◽  
Guanidinium Chloride ◽  
Histidine Residues ◽  
Active Site Cysteine ◽  
High Degree ◽  
Salt Fractionation

Ficin that had been prepared from the latex of Ficus glabrata by salt fractionation and chromatography on carboxymethylcellulose was completely and irreversibly inhibited with 1,3-dibromo[2-14C]acetone and then treated with N-(4-dimethylamino-3,5-dinitrophenyl)maleimide in 6m-guanidinium chloride. After reduction and carboxymethylation of the labelled protein, it was digested with trypsin and α-chymotrypsin. Two radioactive peptides and two coloured peptides were isolated chromatographically and their sequences determined. The radioactive peptides revealed the amino acid sequences around the active-site cysteine and histidine residues and showed a high degree of homology with the omino acid sequence around the active-site cysteine and histidine residues in papain. The coloured peptides allowed the amino acid sequence around the buried cysteine residue in ficin to be determined.

scholarly journals Characterization of a 12-Kilodalton Rhodanese Encoded byglpE of Escherichia coli and Its Interaction with Thioredoxin

2000 ◽  
Vol 182 (8) ◽  
pp. 2277-2284 ◽  
Author(s):  
W. Keith Ray ◽  
Gang Zeng ◽  
M. Benjamin Potters ◽  
Aqil M. Mansuri ◽  
Timothy J. Larson
Keyword(s):  
Escherichia Coli ◽  
Amino Acid ◽  
Amino Acid Sequence ◽  
Active Site ◽  
Amino Acid Sequences ◽  
E Coli ◽  
Active Site Cysteine ◽  
Clusters Of Orthologous Groups ◽  
Thioredoxin 1 ◽  
First Time

ABSTRACT Rhodaneses catalyze the transfer of the sulfane sulfur from thiosulfate or thiosulfonates to thiophilic acceptors such as cyanide and dithiols. In this work, we define for the first time the gene, and hence the amino acid sequence, of a 12-kDa rhodanese fromEscherichia coli. Well-characterized rhodaneses are comprised of two structurally similar ca. 15-kDa domains. Hence, it is thought that duplication of an ancestral rhodanese gene gave rise to the genes that encode the two-domain rhodaneses. The glpEgene, a member of the sn-glycerol 3-phosphate (glp) regulon of E. coli, encodes the 12-kDa rhodanese. As for other characterized rhodaneses, kinetic analysis revealed that catalysis by purified GlpE occurs by way of an enzyme-sulfur intermediate utilizing a double-displacement mechanism requiring an active-site cysteine. TheKm s for SSO3 2− and CN− were 78 and 17 mM, respectively. The apparent molecular mass of GlpE under nondenaturing conditions was 22.5 kDa, indicating that GlpE functions as a dimer. GlpE exhibited ak cat of 230 s−1. Thioredoxin 1 from E. coli, a small multifunctional dithiol protein, served as a sulfur acceptor substrate for GlpE with an apparentKm of 34 μM when thiosulfate was near itsKm , suggesting that thioredoxin 1 or related dithiol proteins could be physiological substrates for sulfurtransferases. The overall degree of amino acid sequence identity between GlpE and the active-site domain of mammalian rhodaneses is limited (∼17%). This work is significant because it begins to reveal the variation in amino acid sequences present in the sulfurtransferases. GlpE is the first among the 41 proteins in COG0607 (rhodanese-related sulfurtransferases) of the database Clusters of Orthologous Groups of proteins (http://www.ncbi.nlm.nih.gov/COG/ ) for which sulfurtransferase activity has been confirmed.

scholarly journals Derived amino acid sequence and identification of active site residues of Escherichia coli beta-hydroxydecanoyl thioester dehydrase.

1988 ◽  
Vol 263 (10) ◽  
pp. 4641-4646 ◽  
Author(s):  
J E Cronan ◽  
W B Li ◽  
R Coleman ◽  
M Narasimhan ◽  
D de Mendoza ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Amino Acid ◽  
Amino Acid Sequence ◽  
Active Site ◽  
Active Site Residues

scholarly journals Amino acid sequence of the active site of Acanthamoeba myosin II.

1986 ◽  
Vol 261 (4) ◽  
pp. 1844-1848
Author(s):  
M A Atkinson ◽  
E A Robinson ◽  
E Appella ◽  
E D Korn
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Active Site ◽  
Myosin Ii

scholarly journals The location of the active-site histidine residue in the primary sequence of papain

1968 ◽  
Vol 108 (5) ◽  
pp. 861-866 ◽  
Author(s):  
S. S. Husain ◽  
G. Lowe
Keyword(s):  
Amino Acid ◽  
Sodium Borohydride ◽  
Active Site ◽  
Iodoacetic Acid ◽  
Cysteine Residue ◽  
Histidine Residue ◽  
Primary Sequence ◽  
Active Site Cysteine ◽  
Active Site Histidine ◽  
Active Site Cysteine Residue

Papain that had been irreversibly inhibited with 1,3-dibromo[2−14C]acetone was reduced with sodium borohydride and carboxymethylated with iodoacetic acid. After digestion with trypsin and α-chymotrypsin the radioactive peptides were purified chromatographically. Their amino acid composition indicated that cysteine-25 and histidine-106 were cross-linked. Since cysteine-25 is known to be the active-site cysteine residue, histidine-106 must be the active-site histidine residue.

Glutamine active site of formylglycinamide ribonucleotide amidotransferase. 2. Amino acid sequence of labeled peptides

Biochemistry ◽  
1977 ◽  
Vol 16 (6) ◽  
pp. 1070-1076 ◽  
Author(s):  
Shiro Ohnoki ◽  
Bor-Shyue Hong ◽  
John M. Buchanan
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Active Site
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