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Year Number of Results
2004 1
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2011 1
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19 results

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Page 1
Expression, characterization, and activity optimization of a novel cellulase from the thermophilic bacteria Cohnella sp. A01.
Mohammadi S, Tarrahimofrad H, Arjmand S, Zamani J, Haghbeen K, Aminzadeh S. Mohammadi S, et al. Sci Rep. 2022 Jun 18;12(1):10301. doi: 10.1038/s41598-022-14651-7. Sci Rep. 2022. PMID: 35717508 Free PMC article.
Using CMC 1% as the substrate, the thermodynamic values were determined as K(m) 0.46 mM, k(cat) 104.30 10(-3) (S(-1)), and k(cat)/K(m) 226.73 (M(-1) S(-1)). The CelC307 was optimally active at 40 C and pH 7.0. ...
Using CMC 1% as the substrate, the thermodynamic values were determined as K(m) 0.46 mM, k(cat) 104.30 10(-3) (S(-1)), and …
Thermophilic iron containing type superoxide dismutase from Cohnella sp. A01.
Shahi ZKM, Takalloo Z, Mohamadzadeh J, Sajedi RH, Haghbeen K, Aminzadeh S. Shahi ZKM, et al. Int J Biol Macromol. 2021 Sep 30;187:373-385. doi: 10.1016/j.ijbiomac.2021.07.150. Epub 2021 Jul 27. Int J Biol Macromol. 2021. PMID: 34329665
The half-life and thermodynamic parameters including deltaH(*), deltaS(*), and deltaG(*) were 187 min at 60 C, 7.3 kJ.mol(-1), -76.8 kJ.mol(-1).K(-1), and 84.1 kJ.mol(-1), respectively. The rCaSOD exhibited catalytic activity in a very broad range of pH (6.0-10.0) and temp …
The half-life and thermodynamic parameters including deltaH(*), deltaS(*), and deltaG(*) were 187 min at 60 C, 7.3 kJ.mol(-1), -76.8 kJ.mol( …
Structural and inhibitory effects of fulvic and humic acids against tyrosinase.
Taherkhani N, Hekmat A, Piri H, Haghbeen K. Taherkhani N, et al. J Food Biochem. 2022 Oct;46(10):e14279. doi: 10.1111/jfbc.14279. Epub 2022 Jun 21. J Food Biochem. 2022. PMID: 35727699
HA and FA demonstrated a mixed type of inhibition with K(i) 2.02 and 5.2 muM, respectively. The thermodynamic parameters displayed that the hydrogen bond and hydrophobic force play a major role in the FA-tyrosinase and HA-tyrosinase interaction, respectively. ...
HA and FA demonstrated a mixed type of inhibition with K(i) 2.02 and 5.2 muM, respectively. The thermodynamic parameters displayed th …
Cohnella amylopullulanases: Biochemical characterization of two recombinant thermophilic enzymes.
Zebardast Roodi F, Aminzadeh S, Farrokhi N, Karkhane A, Haghbeen K. Zebardast Roodi F, et al. PLoS One. 2017 Apr 10;12(4):e0175013. doi: 10.1371/journal.pone.0175013. eCollection 2017. PLoS One. 2017. PMID: 28394913 Free PMC article.
Enzyme activities for both proteins were improved in the availability of Mn2+, Ba2+, Ca2+, and Mg2+ and reduced in the presence of Fe2+, Li2+, Na2+, Triton X100 and urea. Moreover, Co2+, K+, and Cu2+ had a negative effect only on Coh 01133 enzyme....
Enzyme activities for both proteins were improved in the availability of Mn2+, Ba2+, Ca2+, and Mg2+ and reduced in the presence of Fe2+, Li2 …
Expression optimization and characterization of a novel amylopullulanase from the thermophilic Cohnella sp. A01.
Hasani F, Tarrahimofrad H, Safa ZJ, Farrokhi N, Karkhane AA, Haghbeen K, Aminzadeh S. Hasani F, et al. Int J Biol Macromol. 2024 Nov;279(Pt 1):135135. doi: 10.1016/j.ijbiomac.2024.135135. Epub 2024 Aug 27. Int J Biol Macromol. 2024. PMID: 39208893
The enzyme was found to be calcium-independent. The kinetic parameters K(m), V(max), k(cat), and k(cat)/K(m) for amylase activity were 2.4 mg/mL, 38.650 mumol min(-1) mg(-1), 38.1129 S(-1), and 0.09269 S(-1)mg mL(-1), respectively, and for pullulanase …
The enzyme was found to be calcium-independent. The kinetic parameters K(m), V(max), k(cat), and k(cat)/K(m) for …
Cohnella sp. A01 laccase: thermostable, detergent resistant, anti-environmental and industrial pollutants enzyme.
Shafiei M, Afzali F, Karkhane AA, Ebrahimi SM, Haghbeen K, Aminzadeh S. Shafiei M, et al. Heliyon. 2019 Sep 30;5(9):e02543. doi: 10.1016/j.heliyon.2019.e02543. eCollection 2019 Sep. Heliyon. 2019. PMID: 31687608 Free PMC article.
The calculated half-life and kinetic values including K(m), V(max), turn over number (k(cat)), and catalytic efficiency (k(cat)/K(m)) of the enzyme were 106 min at 90 C and 686 muM, 10.69 U/ml, 20.3 S(-), and 0.029 s(-1) muM(-1), respectively. ...
The calculated half-life and kinetic values including K(m), V(max), turn over number (k(cat)), and catalytic efficiency (k …
Toward more specific inhibitor for Solanum tuberosum polyphenol oxidase through a structural insight into its activities and inhibition.
Ghorbanian N, Mousavi A, Marefatjoo MJ, Ghofrani NS, Lohrasebi T, Haghbeen K. Ghorbanian N, et al. J Food Biochem. 2021 Nov;45(11):e13949. doi: 10.1111/jfbc.13949. Epub 2021 Sep 24. J Food Biochem. 2021. PMID: 34558084

Although all these substances inhibited PPO(sol) in mixed-inhibition mode, the results were strongly in favor of vanillin with IC(50) < 1.37 mM and K(i) < 1.2 mM. PRACTICAL APPLICATIONS: There are subtle structural differences in the active site pockets of polyphenol

…

Although all these substances inhibited PPO(sol) in mixed-inhibition mode, the results were strongly in favor of vanillin with IC(50) < 1

…
Catalytic efficiency and thermostability improvement of Suc2 invertase through rational site-directed mutagenesis.
Mohandesi N, Haghbeen K, Ranaei O, Arab SS, Hassani S. Mohandesi N, et al. Enzyme Microb Technol. 2017 Jan;96:14-22. doi: 10.1016/j.enzmictec.2016.09.004. Epub 2016 Sep 11. Enzyme Microb Technol. 2017. PMID: 27871374
The best improvement belonged to Mut1 (54% increase in K(cat)/K(m)) and Mut3 exhibited the worst effect (90% increase in K(m)). These results suggest that Pro152 and Lys153 play key role in preparation of the right substrate lodging in the active site of SInv …
The best improvement belonged to Mut1 (54% increase in K(cat)/K(m)) and Mut3 exhibited the worst effect (90% increase in K …
Direct spectrophotometric assay of laccase using diazo derivatives of guaiacol.
Moshtaghioun SM, Haghbeen K, Sahebghadam AL, Legge RL, Khoshneviszadeh R, Farhadi S. Moshtaghioun SM, et al. Anal Chem. 2011 Jun 1;83(11):4200-5. doi: 10.1021/ac200501w. Epub 2011 May 11. Anal Chem. 2011. PMID: 21545148
Using this method, the kinetic parameters of various DdG carrying different electron donating and withdrawing substituents were used to assay laccase from Neurospora crassa. 2-Methoxy-4-[(4-phenyl)azo]-phenol (K(m) = 93.5 muM and V = 1.98 muM/min) was identified as an appr …
Using this method, the kinetic parameters of various DdG carrying different electron donating and withdrawing substituents were used to assa …
Characterization of a chitinase (Chit62) from Serratia marcescens B4A and its efficacy as a bioshield against plant fungal pathogens.
Babashpour S, Aminzadeh S, Farrokhi N, Karkhane A, Haghbeen K. Babashpour S, et al. Biochem Genet. 2012 Oct;50(9-10):722-35. doi: 10.1007/s10528-012-9515-3. Epub 2012 May 4. Biochem Genet. 2012. PMID: 22555558
The results demonstrated that the optimum pH and temperature for the enzyme activity were 6.0 and 55 C, respectively. The K(m) and V(max) values were 3.30 mg ml(-1) and 0.92 units, respectively. The recombinant chitinase was demonstrated to be highly active in controlling …
The results demonstrated that the optimum pH and temperature for the enzyme activity were 6.0 and 55 C, respectively. The K(m) and V( …
19 results