DNA variants within the 5′-flanking region of milk-protein-encoding genes II. The β-lactoglobulin-encoding gene

1994 ◽  
Vol 89 (1) ◽  
pp. 121-126 ◽  
Author(s):  
V. A. Wagner ◽  
T. A. Schild ◽  
H. Geldermann
Keyword(s):  
Milk Protein ◽  
Protein Encoding ◽  
Dna Variants ◽  
Flanking Region ◽  
Encoding Gene ◽  
Encoding Genes ◽  
Β Lactoglobulin

scholarly journals Identification of Three Genes Encoding PII-Like Proteins in Gluconacetobacter diazotrophicus: Studies of Their Role(s) in the Control of Nitrogen Fixation

2003 ◽  
Vol 185 (19) ◽  
pp. 5854-5861 ◽  
Author(s):  
Olena Perlova ◽  
Alejandro Ureta ◽  
Stefan Nordlund ◽  
Dietmar Meletzus
Keyword(s):  
Gene Expression ◽  
Nitrogen Fixation ◽  
Gluconacetobacter Diazotrophicus ◽  
Triple Mutant ◽  
Gene Encoding ◽  
Protein Encoding ◽  
Genes Encoding ◽  
Encoding Gene ◽  
Encoding Genes ◽  
Expression And Activity

ABSTRACT In our studies on the regulation of nitrogen metabolism in Gluconacetobacter diazotrophicus, an endophytic diazotroph of sugarcane, three glnB-like genes were identified and their role(s) in the control of nitrogen fixation was studied. Sequence analysis revealed that one PII protein-encoding gene, glnB, was adjacent to a glnA gene (encoding glutamine synthetase) and that two other PII protein-encoding genes, identified as glnK1 and glnK2, were located upstream of amtB1 and amtB2, respectively, genes which in other organisms encode ammonium (or methylammonium) transporters. Single and double mutants and a triple mutant with respect to the three PII protein-encoding genes were constructed, and the effects of the mutations on nitrogenase expression and activity in the presence of either ammonium starvation or ammonium sufficiency were studied. Based on the results presented here, it is suggested that none of the three PII homologs is required for nif gene expression, that the GlnK2 protein acts primarily as an inhibitor of nif gene expression, and that GlnB and GlnK1 control the expression of nif genes in response to ammonium availability, both directly and by relieving the inhibition by GlnK2. This model includes novel regulatory features of PII proteins.

scholarly journals Isolation of Genes Encoding Arthropod Odorant Binding Proteins (OBP), D7 from Salivary Gland Vectors of Malaria: Anopheles sundaicus

2016 ◽  
Vol 16 (1) ◽  
pp. 37
Author(s):  
Nuryatmaja Gora Pawana ◽  
Kahar Muzakhar ◽  
Kartika Senjarini
Keyword(s):  
Salivary Gland ◽  
Rna Isolation ◽  
Gene Isolation ◽  
Malaria Vectors ◽  
Rt Pcr ◽  
Total Rna ◽  
Protein Encoding ◽  
Encoding Gene ◽  
Odorant Binding ◽  
Encoding Genes

The isolation of Arthropod Odorant Binding, D7 protein, encoding genes from Anopheles sundaicus and An. maculatus mosquitos as the malaria vectors in Indonesia is necessary to recognize their characteristic. The isolated genes can be used to develop the Transmission Blocking Vaccine (TBV). This research aims to characterize the D7 protein encoding genes from An. sundaicus and An. maculatus through the synthesis of complementary DNA (cDNA) of D7 protein by using D7 protein primer that has been used for the other species of Anopheles. The mosquitos were taken from Dusun Parasputih, Bangsring, Wongsorejo, Banyuwangi, Jawa Timur. Isolation of the salivary gland was done by performing microdisection method and the isolation of the total RNA was done by performing High Pure RNA Isolation Kit (Roche-Germany). Synthesis of cDNA D7 encoding gene and its amplification were performed by using Maxime RT-PCR Premix Kit (iNtRon Biotechnology). The result of the total RNA and RT-PCR were run  in agarose gel and visualized under the UV transiluminator. Based on the visualization, we found that the salivary gland total RNA of female An. sundaicus was 500-750 base pair (bp). The RT-PCR visualization showed a band sized below 100 bp and it was concluded not to be the size of the D7 protein encoding gene. An incompatibility of D7 primer from An. gambiae with cDNA template from An. sundaicus was suspected to be the reason of the gene isolation failure.Keywords: gene isolation, D7 protein, salivary gland, Anopheles sundaicus

scholarly journals Multiple Effects of Genetic Background on Variegated Transgene Expression in Mice

Genetics ◽  
2002 ◽  
Vol 160 (3) ◽  
pp. 1107-1112
Author(s):  
Margaret L Opsahl ◽  
Margaret McClenaghan ◽  
Anthea Springbett ◽  
Sarah Reid ◽  
Richard Lathe ◽  
...  
Keyword(s):  
Transgene Expression ◽  
Milk Protein ◽  
Position Effect ◽  
Position Effect Variegation ◽  
Parental Population ◽  
Expression Levels ◽  
Variable Expression ◽  
Specific Effects ◽  
Milk Protein Genes ◽  
Β Lactoglobulin

Abstract BLG/7 transgenic mice express an ovine β-lactoglobulin transgene during lactation. Unusually, transgene expression levels in milk differ between siblings. This variable expression is due to variegated transgene expression in the mammary gland and is reminiscent of position-effect variegation. The BLG/7 line was created and maintained on a mixed CBA × C57BL/6 background. We have investigated the effect on transgene expression of backcrossing for 13 generations into these backgrounds. Variable transgene expression was observed in all populations examined, confirming that it is an inherent property of the transgene array at its site of integration. There were also strain-specific effects on transgene expression that appear to be independent of the inherent variegation. The transgene, compared to endogenous milk protein genes, is specifically susceptible to inbreeding depression. Outcrossing restored transgene expression levels to that of the parental population; thus suppression was not inherited. Finally, no generation-dependent decrease in mean expression levels was observed in the parental population. Thus, although the BLG/7 transgene is expressed in a variegated manner, there was no generation-associated accumulated silencing of transgene expression.

scholarly journals What’s all the phos about? Insights into the phosphorylation state of the RNA polymerase II C-terminal domain via mass spectrometry

2021 ◽  
Author(s):  
Blase Matthew LeBlanc ◽  
Rosamaria Yvette Moreno ◽  
Edwin Escobar ◽  
Mukesh Kumar Venkat Ramani ◽  
Jennifer S Brodbelt ◽  
...  
Keyword(s):  
Rna Polymerase ◽  
Rna Polymerase Ii ◽  
Phosphorylation State ◽  
Terminal Domain ◽  
Carboxy Terminal Domain ◽  
Protein Encoding ◽  
Small Nuclear Rnas ◽  
Rnap Ii ◽  
Carboxy Terminal ◽  
Encoding Genes

RNA polymerase II (RNAP II) is one of the primary enzymes responsible for expressing protein-encoding genes and some small nuclear RNAs. The enigmatic carboxy-terminal domain (CTD) of RNAP II and...

scholarly journals Autotransporter Protein-Encoding Genes of Diarrheagenic Escherichia coli Are Found in both Typical and Atypical Enteropathogenic E. coli Strains

2012 ◽  
Vol 79 (1) ◽  
pp. 411-414 ◽  
Author(s):  
Afonso G. Abreu ◽  
Vanessa Bueris ◽  
Tatiane M. Porangaba ◽  
Marcelo P. Sircili ◽  
Fernando Navarro-Garcia ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Content Type ◽  
E Coli ◽  
Diarrheagenic Escherichia Coli ◽  
Virulence Markers ◽  
Protein Encoding ◽  
Encoding Genes ◽  
Specific Virulence

ABSTRACTAutotransporter (AT) protein-encoding genes of diarrheagenicEscherichia coli(DEC) pathotypes (cah,eatA,ehaABCDJ,espC,espI,espP,pet,pic,sat, andtibA) were detected in typical and atypical enteropathogenicE. coli(EPEC) in frequencies between 0.8% and 39.3%. Although these ATs have been described in particular DEC pathotypes, their presence in EPEC indicates that they should not be considered specific virulence markers.

Milk protein polymorphism in Danish dairy cattle and the influence of genetic variants on milk yield

1990 ◽  
Vol 57 (1) ◽  
pp. 53-62 ◽  
Author(s):  
Anne-Marie Bech ◽  
K. Rotvig Kristiansen
Keyword(s):  
Dairy Cattle ◽  
Milk Fat ◽  
Milk Protein ◽  
Gene Frequencies ◽  
Black And White ◽  
Milk Samples ◽  
Yield Parameters ◽  
Jersey Cows ◽  
Β Lactoglobulin ◽  
Danish Dairy

SummaryIn milk samples from 549 cows of the breeds Danish Jersey, Red Danish Dairy Cattle (RDM), and Black and White Danish Dairy Cattle (SDM) the genetic polymorphisms of the αs1, β and K-cascin and β-lactoglobulin (β-Lg) loci were determined by isoelectric focusing in agarose gels. The results of the screening were comparcd with results obtained by Larsen & Thymann (1966). In addition, the genetic linkage of the three casein loci was studied, and the association between milk protein genotypes and yields in first and second lactations of milk, fat and protein were investigated.The distribution of genotypes of all four milk protein Systems was different from breed to breed.For Jersey cows, significant differences in the gene frequencies from the results of the 1966 investigation were found for αs1 and K-casein and β-Lg. For SDM cows a change in the K-casein frequency had occurred whereas for RDM cows no changes were found.Linkage between some of the casein loci was found within ail three breeds. For the RDM breed the possible linkage between αs1-casein and the other caseins could not be tested bccause nearly ail thc cows were homozygous for the αs1-cascin-B genotypes.β-Casein genotypes were associated with yield parameters in ail breeds. The A2A2 genotype of this protein gave higher yields of milk, fat, and protein in the second lactation than thc A1A1 genotype.

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