It has been proven that specific isoforms of human carbonic anhydrase (hCA) are able to fine-tune physiological pathways connected to signal processing, and that decreased CAs expression negatively influences cognition, leading to mental retardation, Alzheimer's disease, and aging-related cognitive dysfunctions. For this reason, a small library of natural and synthetic nitrogen containing cycli...

Carbonic anhydrases (CAs) are zinc-containing metalloenzymes that catalyze the interconversion of carbon dioxide and bicarbonate. The alpha-class CAs are found predominantly in vertebrates, but they are also expressed in insects like mosquitoes. Recently, an alpha-CA from the midgut of Aedes aegypti larvae (AaCA1) was identified, cloned, and subsequently shown to share high sequence homologous ...

Human carbonic anhydrase II (hCA II) is a zinc metalloenzyme that catalyzes the reversible hydration/dehydration of CO2/HCO3-. Although hCA II has been extensively studied to investigate the proton-transfer process that occurs in the active site, its underlying mechanism is still not fully understood. Here, ultrahigh-resolution crystallographic structures of hCA II cryocooled under CO2 pressure...

Copyright © 2013 Paulette Bioulac-Sage et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. This special issue is an attempt to cover some new aspects concerning benign hepatocellular tumors: focal nodular hyperplasia (FNH) and ...

Catalysis by the zinc metalloenzyme human carbonic anhydrase II (HCA II) is limited in maximal velocity by proton transfer between His64 and the zinc-bound solvent molecule. Asn62 extends into the active site cavity of HCA II adjacent to His64 and has been shown to be one of several hydrophilic residues participating in a hydrogen-bonded solvent network within the active site. We compared sever...

BACKGROUND Healthcare-associated (HCA) bloodstream infections (BSI) have been associated with worse outcomes, in terms of higher frequencies of antibiotic-resistant microorganisms and inappropriate therapy than strict community-acquired (CA) BSI. Recent changes in the epidemiology of community (CO)-BSI and treatment protocols may have modified this association. The objective of this study was t...

BACKGROUND AND PURPOSE The aim of this study was to report the CT evolution and clinical significance of HCA after intra-arterial mechanical thrombectomy (revascularization by using retrievers and/or other mechanical devices without concomitant delivery of intra-arterial thrombolytics) in our patients. These lesions are common after intra-arterial thrombolysis, being considered a negative progn...

OBJECTIVE Although intra-amniotic(IA) infection is present in both preterm labor and intact membranes(PTL) and preterm premature rupture of membranes(preterm-PROM), it is more common in preterm-PROM than in PTL. Microorganisms and their products in the amniotic-cavity can elicit an inflammatory-response in fetus as well as in amniotic-cavity in the progression of acute histologic chorioamnionit...

Crystals of human carbonic anhydrase II with a specific point mutation, His 64 to Ala, have been grown in a solution of ammonium sulfate in the presence of mercury chloride. The crystals appear in approximately two weeks and belong to the monoclinic space group P21, with unit cell parameters of a = 42.2 Å, b = 41.4 Å, c = 71.9 Å, β = 104.2 and one carbonic anhydrase molecule in the asymmetric u...

Üç alfa-karbonik anhidraz, insan karbonik anhidraz I, II (hCA I, II) ve koyun böbrek karbonik anhidraz (sCA) saflaştırıldı ve enzimlerle oksitetrasiklinin kinetik etkileşmeleri incelendi. Saflaştırma prosedürü homojenat hazırlama ve Sepharose 4B-trizonsüllfanilamid afinite kramatografisinden oluştu. Oksitetrasiklin hCA I, II ve sCA enzim aktivitelerinde in vitro aktivatör etkisi gösterdi. Bu an...