Search for protein partners of mitochondrial single-stranded DNA-binding protein Rim1p using a yeast two-hybrid system

2003 ◽  
Vol 48 (2) ◽  
pp. 183-188 ◽  
Author(s):  
B. Kucejová ◽  
F. Foury
2001 ◽  
Vol 46 (4) ◽  
pp. 292-296 ◽  
Author(s):  
P. Prepiak ◽  
Z. Chromíková ◽  
I. Barák

2000 ◽  
Vol 2 (2) ◽  
pp. 101-114 ◽  
Author(s):  
Thilo Pfeuffer ◽  
Werner Goebel ◽  
Julia Laubinger ◽  
Michael Bachmann ◽  
Michael Kuhn

2003 ◽  
Vol 278 (43) ◽  
pp. 42487-42494 ◽  
Author(s):  
Teruo Sugawara ◽  
Hiroshi Shimizu ◽  
Nobuhiko Hoshi ◽  
Ayako Nakajima ◽  
Seiichiro Fujimoto

1999 ◽  
Vol 181 (20) ◽  
pp. 6535-6539 ◽  
Author(s):  
Shi Lei ◽  
Lakshmidevi Pulakat ◽  
Narasaiah Gavini

ABSTRACT In diazotrophic organisms, nitrogenase synthesis and activity are tightly regulated. Two genes, nifL and nifA, are implicated as playing a major role in this regulation. NifA is a transcriptional activator, and its activity is inhibited by NifL in response to availability of excess fixed nitrogen and high O2 tension. It was postulated that NifL binds to NifA to inhibit NifA-mediated transcriptional activation of nifgenes. Mutational analysis combined with transcriptional activation studies clearly is in agreement with the proposal that NifL interacts with NifA. However, several attempts to identify NifA-NifL interactions by using methods such as coimmunoprecipitations and chemical cross-linking experiments failed to detect direct interactions between these proteins. Here we have taken a genetic approach, the use of a yeast two-hybrid protein-protein interaction assay system, to investigate NifL interaction with NifA. A DNA fragment corresponding to the kinase-like domain of nifL was PCR amplified and was used to generate translation fusions with the DNA binding domain and the DNA activation domain of the yeast transcriptional activator GAL4 in yeast two-hybrid vectors. Similarly, a DNA fragment corresponding to the catalytic domain of nifA was PCR amplified and used to generate translation fusions with the DNA-binding domain and the DNA-activation domain of GAL4 in yeast two-hybrid vectors. After introducing appropriate plasmid combinations in yeast cells, the existance of direct interaction between NifA and NifL was analyzed with the MATCHMAKER yeast two-hybrid system by testing for the expression oflacZ and his3 genes. These analyses showed that the kinase-like domain of NifL directly interacts with the catalytic domain of NifA.


2003 ◽  
Vol 286 (2) ◽  
pp. 233-240 ◽  
Author(s):  
Youhei Saito ◽  
Nobuyuki Yamagishi ◽  
Keiichi Ishihara ◽  
Takumi Hatayama

1998 ◽  
Vol 18 (7) ◽  
pp. 4400-4406 ◽  
Author(s):  
Sharon L. Hays ◽  
Antoine A. Firmenich ◽  
Philip Massey ◽  
Ronadip Banerjee ◽  
Paul Berg

ABSTRACT The RFA1 gene encodes the large subunit of the yeast trimeric single-stranded DNA binding protein replication protein A (RPA), which is known to play a critical role in DNA replication. ASaccharomyces cerevisiae strain carrying therfa1-44 allele displays a number of impaired recombination and repair phenotypes, all of which are suppressible by overexpression of RAD52. We demonstrate that a rad52 mutation is epistatic to the rfa1-44 mutation, placingRFA1 and RAD52 in the same genetic pathway. Furthermore, two-hybrid analysis indicates the existence of interactions between Rad52 and all three subunits of RPA. The nature of this Rad52-RPA interaction was further explored by using two different mutant alleles of rad52. Both mutations lie in the amino terminus of Rad52, a region previously defined as being responsible for its DNA binding ability (U. H. Mortenson, C. Beudixen, I. Sunjeuaric, and R. Rothstein, Proc. Natl. Acad. Sci. USA 93:10729–10734, 1996). The yeast two-hybrid system was used to monitor the protein-protein interactions of the mutant Rad52 proteins. Both of the mutant proteins are capable of self-interaction but are unable to interact with Rad51. The mutant proteins also lack the ability to interact with the large subunit of RPA, Rfa1. Interestingly, they retain their ability to interact with the medium-sized subunit, Rfa2. Given the location of the mutations in the DNA binding domain of Rad52, a model incorporating the role of DNA in the protein-protein interactions involved in the repair of DNA double-strand breaks is presented.


2013 ◽  
Vol 38 (9) ◽  
pp. 1583-1591
Author(s):  
Li-Yan XUE ◽  
Bing LUO ◽  
Li-Quan ZHU ◽  
Yong-Jun YANG ◽  
He-Cui ZHANG ◽  
...  

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