Halil İbrahim Guler

Halil İbrahim Guler
Karadeniz Technical University · Department of Molecular Biology and Genetics

PhD

About

50
Publications
6,603
Reads
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244
Citations
Citations since 2017
34 Research Items
231 Citations
2017201820192020202120222023020406080
2017201820192020202120222023020406080
2017201820192020202120222023020406080
2017201820192020202120222023020406080
Additional affiliations
February 2016 - present
Karadeniz Technical University
Position
  • Professor (Assistant)
December 2015 - March 2016
Karadeniz Technical University
Position
  • Dr
January 2009 - February 2016
Artvin Coruh Universitesi
Position
  • Research Assistant

Publications

Publications (50)
Article
Full-text available
Aim: The aim of this study was to investigate the polymorphism frequency of plasminogen activator inhibitor-1 (PAI-1) (rs1799889) 4G/5G in patients with lung cancer. Methods: In this study, 286 genomic DNAs (154 lung cancer patients+132 subjects without lung cancer) were analyzed. Polymorphisms were determined by using the polymerase chain react...
Article
Full-text available
In the present study, we aim to clarify the taxonomic positions of Anoxybacillus salavatliensis DSM 22626T and Anoxybacillus gonensis G2T by using whole genome phylogenetic analysis, biochemical and chemotaxonomic characteristics. The genome sequences of A. salavatliensis DSM 22626T was not available in any database, so it was sequenced in this stu...
Article
5-methyl-4-(2-(piperazin-1-yl)ethyl)-2,4-dihydro-3H-1,2,4-triazol-3-one (I), title compound was synthesized and characterized by FTIR, NMR (¹H- and ¹³C-NMR) and Mass spectroscopy. The optimized geometrical structure, electrronic (FMO, MEP, NLO, NMR, NBO) and spectroscopic properties (IR, UV) of title molecule were obtained by using quantum chemicia...
Article
Full-text available
Two series of 1,3,4-thiadiazole (40a-o) and 1,2,4-triazole-5-thione (41a-l) derivatives bearing a 2-pentyl-5-phenyl-1,2,4-triazole-3-one ring were synthesized and then studied for their urease inhibitory activities using thiourea as a standard drug. Among the two groups, the first group (40a-o) did not show good activity while the second group (41a...
Article
Full-text available
In this study, we aimed to clarify the taxonomic positions of Anoxybacilluskamchatkensis DSM 14988T and Anoxybacillusayderensis AB04T using whole-genome phylogenetic analysis, biochemical and chemotaxonomic characteristics. In phylogenetic trees drawn using whole-genome sequences and 16S rRNA gene sequences, A. kamchatkensis DSM 14988T and A. ayder...
Article
Full-text available
A violacein-producing bacterium was isolated from a mud sample collected near a hot spring on Kümbet Plateau in Giresun Province and named the GK strain. According to the phylogenetic tree constructed using 16S rRNA gene sequence analysis, the GK strain was identified and named Janthinobacterium sp. GK. The crude violacein pigments were separated i...
Article
Background: Type 2 diabetes mellitus (T2DM) is a complex metabolic disease with a genetic predisposition. Methylenetetrahydrofolatereductase (MTHFR) gene is one of the candidate genes associated with T2DM and diabetic nephropathy (DN). This research was carried out to determine the frequency of the C677T polymorphism (rs1801133) of the MTHFR gene a...
Article
Carbazol derivatives, 4-(((9-ethyl-9H-carbazol-3-yl)methylene)amino)-5-methyl-2,4-dihydro-3H-1,2,4-triazole-3-one (3) and 5-benzyl-4-(((9-ethyl-9H-carbazol-3-yl) methylene) amino)-2,4-dihydro-3H-1,2,4-triazole-3-one (4), were synthesized. Compounds 3 and 4 were characterized by The Fourier transform infrared (FTIR), proton and carbon-13 nuclear mag...
Article
In this study, triazol derivatives, 4,4'-(((1E, 1E')-1,2-phenylenebis (methanylyidene)) bis (azanylidene)) bis (5-methyl-2,4-dihydro-3H-1,2,4-triazol-3-one (2), 4,4'-(((1E, 1E')-1,3-phenylenebis (methanylyidene)) bis (azanylidene)) bis (5-methyl-2,4-dihydro-3H-1,2,4-triazol-3-one (3) and 4,4'-(((1E, 1E')-1,4-phenylene bis (methanyl yidene)) bis (az...
Article
Full-text available
In the present study, we attempted to clarify the taxonomic positions of Anoxybacillus karvacharensis K1T, Anoxybacillus kestanbolensis NCIMB 13971T, Anoxybacillus flavithermus subsp. yunnanensis CCTCC AB2010187T, and Anoxybacillus tengchongensis DSM 23211T using whole-genome phylogenetic analysis. The genome sequence of A. kestanbolensis NCIMB1397...
Preprint
Full-text available
In the present study, we attempted to clarify the relationship between Anoxybacillus karvacharensis K1T and Anoxybacillus kestanbolensis NCIMB13971T by using whole-genome phylogenetic analysis. The genome sequence of A.kestanbolensis NCIMB13971T was not available in any database, so it was sequenced in this study. The 16S rRNA gene sequence obtaine...
Article
This study reports a novel BglA9 gene of 1345 bp encoding β-glucosidase from Anoxybacillus ayderensis A9, which was amplified and expressed in E. coli BL21 (DE3): pLysS cells, purified with Ni-NTA column having molecular weight of 52.6 kDa and was used in the bioconversion of polydatin to resveratrol. The kinetic parameters values using pNPG as sub...
Article
Full-text available
3-(5-(1H-imidazol-1-yl) pent-1-en-1-yl)-9-ethyl-9H-carbazole called as compound 1 was synthesized and characterized by proton and carbon-13 nuclear magnetic resonance (¹H- and ¹³C- NMR) and Fourier transform infrared (FTIR) spectroscopic methods. Density Functional Theory/Becke, 3-parameter (DFT/B3LYP), for compound 1 were performed with 6-311++G(d...
Article
Full-text available
AIDS is a global disease caused by HIV, affecting millions of people and causing death. The current limitations of antiretroviral therapy used in the therapy of HIV/AIDS have led to the need to search for new and effective drugs from natural products, especially plants. Herewith, using the present study, the detection of HIV-1-RT inhibition of aque...
Article
Full-text available
Propolis is a multi-functional bee product rich in polyphenols. In this study, the inhibitory effect of Anatolian propolis against SARS-coronavirus-2 (SARS-CoV-2) was investigated in vitro and in silico. Raw and commercial propolis samples were used, and both samples were found to be rich in caffeic acid, p-coumaric acid, ferulic acid, t-cinnamic a...
Article
Full-text available
Chalcone derivative, ethyl 2-(4-(3-(benzo[b]thiophen-2yl)acryloyl)phenoxy)acetate (I), was synthesized. Compound I was characterized by proton and carbon-13 nuclear magnetic resonance (¹H- and ¹³C- NMR), fourier transform infrared (FTIR) and mass (LC-ESI-MS/MS) spectroscopic methods. Density Functional Theory (DFT) calculations for compound I were...
Article
Full-text available
The angiotensin-converting enzyme (ACE)-related carboxypeptidase, ACE-II, is a type I integral membrane protein of 805 amino acids that contains 1 HEXXH-E zinc binding consensus sequence. ACE-II has been implicated in the regulation of heart function and also as a functional receptor for the coronavirus that causes the severe acute respiratory synd...
Article
Full-text available
In this study, 4-((1-(4-chlorobenzyl)-1H-1,2,3-triazole-4-yl)methoxy)-3-methoxybenzaldehyde (I) was synthesized and molecular structure of compound I was confirmed by FTIR and NMR (¹H- and ¹³C-NMR) spectroscopic methods. The geometric structure of compound I was optimized by DFT/B3LYP method using 6-311++G(d, p) basis set. The molecular docking stu...
Article
Most of the presently known β-glucosidases are sensitive to end-product inhibition by glucose, restricting their potential use in many industrial applications. Identification of novel glucose tolerant β-glucosidase can prove a pivotal solution to eliminate end-product inhibition and enhance the overall lignocellulosic saccharification process. In t...
Preprint
Full-text available
Propolis is a multi-functional bee product with a rich in polyphenols. In this study, the inhibition effect of Anatolian propolis against SARS coronavirus-2 (SARS CoV-2) was investigated as in vitro and in silico. Raw and commercial of propolis samples were used in the study and it was found that both of were rich in caffeic acid, p-coumaric acid,...
Article
Background: Genetic predisposition is an important risk factor in coronary artery disease (CAD).This study was conducted to determine the polymorphism frequencies of the plasminogen activator inhibitor-1(PAI-1) gene 4G/5G, Angiotensin-converting enzyme (ACE) gene I/D,and Angiotensin II type 1 receptor (AT1) gene A1166C genotypes and to examine the...
Article
Full-text available
This study aims to determine the diversity of culturable thermophilic bacteria isolated from eight terrestrial hot springs in Northeastern of Algeria using the conventional methods, SDS-PAGE fingerprinting of whole-cell proteins and 16S rRNA gene sequencing. In addition, their hydrolytic enzyme activities were also investigated. A total of 293 stra...
Preprint
Full-text available
The angiotensin-converting enzyme (ACE)-related carboxypeptidase, ACE-II, is a type I integral membrane protein of 805 amino acids that contains one HEXXH-E zinc binding consensus sequence. ACE-II has been implicated in the regulation of heart function and also as a functional receptor for the coronavirus that causes the severe acute respiratory sy...
Article
Full-text available
Opiorphin secreted into the human saliva is an endogenous regulator pentapeptide (QRFSR) showing a pain suppressant effect similar to morphine. We report here a strategy of producing tandemly repeated multimers of opiorphin peptide efficiently by expressing in Esherichia coli cells. For improving the expression level and increasing the yield of pen...
Article
Full-text available
The ferulic acid esterase (FAE) gene from Geobacillus thermoglucosidasius DSM 2542T was cloned into pET28a(+) expression vector and characterized and is being reported in this study for the first time in Geobacillus. The enzyme, designated as GthFAE, was purified by heat shock and ion-exchange column chromatography. In addition, a second clone cont...
Article
Full-text available
Introduction : Hypertension (HT) is characterized by high blood pressure. The reninangiotensin-aldosterone system (RAAS) plays a crucial role in blood pressure (BP) regulation by maintaining vascular tone and the water-sodium balance. We aimed to investigate whether there is any relation between AGT (M235T), ACE (I/D), and AGTR1 (A1166C) genetic po...
Article
Full-text available
The metal-free phthalocyanine (H 2 Pc) and metallophthalocyanines complexes (CoPc, CuPc and ZnPc) were synthesized by the reaction of dinitrile derivatization in dry n-pentanol by a classical method. The structures and electrochemical properties of the new compounds were characterized by using spectroscopic data, elemental analysis and electrochemi...
Article
A cryptic plasmid pHIG22 from Thermus scotoductus sp. K6, an isolate from the Alangullu Hot Spring (Aydin, Turkey), was sequenced and characterized. The pHIG22 plasmid is a multicopy, double stranded and 2222 bp circular molecule with 62.78% GC content, which shows a characteristical nucleotide sequence without any homology to other known plasmids....
Article
Full-text available
Chemical bleaching process of paper pulps gives off excessive amount of chlorinated organic wastes mostly released to environment without exposing complete bioremediaton. Recent alternative and eco-friendly approaches towards pulp bleaching appear more responsive to environmental awareness. Here we report, direct use of a recombinant Bacillus subti...
Article
Full-text available
This study describes a new genus and species of microsporidia which is a pathogen of the elm leaf beetle, Xanthogaleruca luteola Muller, 1776 (Coleoptera: Chrysomelidae). The beetles were collected from Istanbul in Turkey. All developmental stages are uninucleate and in direct contact with the host cell cytoplasm. Giemsa-stained mature spores are o...
Article
Full-text available
High levels of extracellular xylanase activity (994.50 IU/ml) produced by Geobacillus thermodenitrificans C5 originated gene was detected when it was expressed in E. coli BL21 host. Thermostable xylanase (GthC5Xyl) was purified to homogeneity and showed a molecular mass of approximately 44 kDa according to SDS-PAGE. The specific activity of the pur...
Article
Geobacillus thermodenitrificans AK53 xyl gene encoding xylanase was isolated, cloned and expressed in Escherichia coli. After purifying recombinant xylanase from G. thermodenitrificans AK53 (GthAK53Xyl) to homogeneity by ammonium sulfate precipitation and ion exchange chromatography, biochemical properties of the enzyme were determined. The kinetic...
Article
Geobacillus thermodenitrificans AK53 xyl gene encoding xylanase was isolated, cloned and expressed in Escherichia coli. After purifying recombinant xylanase from G. thermodenitrificans AK53 (GthAK53Xyl) to homogeneity by ammonium sulfate precipitation and ion exchange chromatography, biochemical properties of the enzyme were determined. The kinetic...
Article
Full-text available
Objective: Coronary artery disease (CAD) is a multifacto­rial disease that influenced by both genetic and environ­mental factors. Single nucleotide polymorphisms (SNPs) in the candidate genes produce susceptibility to such mul­tifactorial diseases. Therefore, investigations of SNPs, in the genes that may play role in etiopathogenesis of CAD, become...
Article
Full-text available
Iron oxidase, a member of the high potential iron–sulfur protein (HiPIP) family within the iron–sulfur cluster, was thought to be involved in the iron respiratory electron transport chain in Acidithiobacillus ferrooxidans. A. ferrooxidans M1 strain was isolated from Murgul copper mine. The iro gene of this bacterium encoding iron oxidase was cloned...
Article
Full-text available
Two Gram-positive, moderately thermophilic, endospore-forming, rod-shaped, motile bacteria were isolated from Camkoy hot spring in the provinces of Aydın, Turkey and were characterized in order to determine their phylogenetic positions. These strains were designated as PDF4T and PDF10. 16S rRNA gene sequence analysis revealed that the two strains b...
Article
A Gram-stain-negative, lack of motility, catalase- and oxidase- positive bacterium (strain MT1(T) ) was isolated from Buharkent hot spring in Aydin, Turkey. Its taxonomy was investigated using a polyphasic approach. The strain was able to grow at 45-80 °C, pH 5.5-10.5 and with a NaCI tolerance up to 2.0% (w/v). Strain MT1(T) was able to utilize d-m...
Article
Full-text available
Hypertension (HT) is a common and life threating health problem worldwide leading to stroke, heart attack and renal failure. It is characterized by elevated blood pressure forced heart load. Human interleukin-6 (IL-6) and C- reactive protein (CRP) are known to be involved in inflammatory processes. IL-6 gene is a polymorphic gene which −174 G/C is...
Article
Full-text available
The current study was conducted to determine whether there is a relation between hypertension and two different polymorphisms, including C1562T of the Matrix metalloproteinase-9 (MMP-9) gene and C677T of the methylenetetrahydrofolate reductase (MTHFR) gene. Genomic DNA obtained from 224 persons (125 patients with hypertension and 99 healthy control...

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