Document Details

Document Type : Article In Journal 
Document Title :
Distribution of Adenylyl Cyclase and Guanylyl Cyclase in Rat Tissues
توزيع انزيمات أيض النيوكليوتيدات الحلقية في انسجة الجرذ
 
Subject : Chemistry & Biochemistry 
Document Language : English 
Abstract : The specific activities of adenylyl and guanylyl cyclases, the cAMP and cGMP phosphodiesterase of rat kidney, liver, heart and brain were examined. Of all tissues, kidney has the highest adenylyl cyclase specific activities by mean (± SD) of (145 ± 14 pmol/min/mg protein) followed by that of heart (113 ± 21 pmol/min/mg protein), brain (101 ± 8 pmol/min/mg protein) and liver (92 ± 9 pmol/min/mg protein). The specific activity of particulate guanylyl cyclase was the highest in liver (26 ± 1 nmol/min/mg protein), but the soluble form predominated in kidney (40 ± 2 nmol/min/mg protein). In contrast to the other tissues examined, brain showed relatively high cAMP and cGMP phosphodiesterase activities. The kinetic properties of the adenylyl cyclases and cAMP phosphodiesterases were also investigated. The optimum pH for both types of activity was found to be at 7.4. ubcellular fractionation of the kidney to locate adenylyl cyclase activity revealed that both the mitochondrial and the microsomal fractions had higher specific activities than that of the nuclear fraction.Studies on the tissue distribution of cyclic nucleotide PDE activity as well as adenylyl and guanylyl cyclase showed that it is widely distributed in intra and extracellular and they have an important role in signal and nucleotide transdaction. 
ISSN : 1012-1319 
Journal Name : Science Journal 
Volume : 15 
Issue Number : 1 
Publishing Year : 1423 AH
2003 AD 
Number Of Pages : 13 
Article Type : Article 
Added Date : Sunday, October 11, 2009 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
جلال الدين خان JALALUDDIN A. KHANResearcher  
وديعة صالح بكرWADIAH S. BACKERResearcher  

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