Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:2.7.11.12 (PKG)
 2,515 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Twelve similar recombinant Per a 1 clones were produced from an American cockroach (CR) cDNA library. The nucleotide sequence of a representative cline, i.e. clone A6, contained 579 base pairs (bp) and a 372 bp open reading frame (2-373) encoding 124 amino acids. A stop codon was found at position 374-376 followed by a 3' end untranslated region with an AATAAA polyadenylation signal and a poly (A) tail. The estimated molecular mass of the 24 amino acid residue protein was 13.8 kDa, with a predicted isoelectric point value of 4.74. Cysteine or N-linked glycosylation was not found. The deduced amino acid sequence of the A6 revealed 84.68-95.97% identity to other previously reported Per a 1 clones and 65.87-69.60% homology to the previously reported Bla g 1 clones. However, while previously reported Per a 1 clones showed homology to ANG12, a precursor protein in the midgut of the female Anopheles gambiae secreted after the blood meal, the A6 DNA sequence was found to have homology (37.1%) to DNA of G2, a putative protein in the midgut of Aedes aegypti (AY 050565). The deduced amino acid sequence of A6 contained a mitochondrial energy transfer protein signature, phosphorylation sites for the cAMP-and cGMP-dependent protein kinase C and casein kinase II. Hydrophobic and hydrophilic characteristics of the A6 deduced peptide indicated that it was a transmembrane protein. This is the first report that Per a 1 is a transmembrane protein. The deduced amino acid sequence of the A6, which contained the sequence LIRSLFGLP, differed in one amino acid from two previously reported epitopes, i.e. LIRALFGL and IRSWFGLP, of Per a 1.0104 which bound 80% and 100%, respectively, to IgE of the allergic patients tested. The A6 DNA sequence was deposited in the GenBank (Accession number AY 259514) and has been designated Per a 1.0105. The A6 expressed protein bound to monoclonal antibodies (MAb 3C2) specific to American cockroach and also bound to IgE of all (100%) of the 20 allergic Thai patients.
 ...
PMID:Recombinant American cockroach component, Per a 1, reactive to IgE of allergic Thai patients. 1293 46

We have previously demonstrated that exogenous nitric oxide (NO) inhibited anti-IgE-mediated histamine release from human cultured mast cells. In the current study, we further investigated if syntheses of eicosanoids and cytokines were also suppressed by NO donors and evaluated if activation of soluble guanylyl cyclase (sGC) was an underlying mechanism. The effects of the NO donor diethylamine NONOate (DEA/NO) on IgE-dependent syntheses of eicosanoids (prostaglandin D(2) and cysteinyl leukotrienes) and cytokines (tumor necrosis factor-alpha and interleukin-8) from buffy coat derived human cultured mast cells were examined. The effects of sGC related agents on human mast cell activation were studied by measuring histamine release. DEA/NO (10(-7)-10(-4)M) dose-dependently inhibited anti-IgE induced release of histamine, eicosanoids and cytokines. It could also significantly increase intracellular cyclic guanosine monophosphate (cGMP) but reduce anti-IgE induced activation of ERK1/2, JNK1/2 and NF-kappaB. The inhibition of anti-IgE induced histamine release by DEA/NO was reversed by the sGC inhibitor 1H-[1,2,4]oxadiazolo[4,3-a]quinoxalin-1-one (ODQ, 10(-7)M) and the cGMP-dependent protein kinase (PKG) inhibitor, Rp-8-(4-Chlorophenylthio)-guanosine-3',5'-cyclic monophosphorothioate (Rp-8-pCPT-cGMPS, 10(-5)M). The current study confirmed the inhibitory action of exogenous NO on immunological activation of human mast cells. We also provided evidence for the first time that the activation of the sGC-cGMP-PKG pathways together with the suppression of phosphorylation of MAPKs and NF-kappaB contributed to the mast cell modulating action of NO in human.
 ...
PMID:Cyclic guanosine monophosphate dependent pathway contributes to human mast cell inhibitory actions of the nitric oxide donor, diethylamine NONOate. 2009 83