Correlation of two-hybrid affinity data with in vitro measurements

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Published inMolecular and Cellular Biology Vol. 15; no. 10; pp. 5820 - 5829
Main Authors Estojak, Joanne, Brent, Roger, Golemis, Erica A.
Format Journal Article
LanguageEnglish
Published United States American Society for Microbiology 01.10.1995
Taylor & Francis
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Abstract Article Usage Stats Services MCB Citing Articles Google Scholar PubMed Related Content Social Bookmarking CiteULike Delicious Digg Facebook Google+ Mendeley Reddit StumbleUpon Twitter current issue Spotlights in the Current Issue MCB About MCB Subscribers Authors Reviewers Advertisers Inquiries from the Press Permissions & Commercial Reprints ASM Journals Public Access Policy MCB RSS Feeds 1752 N Street N.W. • Washington DC 20036 202.737.3600 • 202.942.9355 fax • journals@asmusa.org Print ISSN: 0270-7306 Online ISSN: 1098-5549 Copyright © 2014 by the American Society for Microbiology.   For an alternate route to MCB .asm.org, visit: MCB       
AbstractList Since their introduction, the interaction trap and other two-hybrid systems have been used to study protein-protein interactions. Despite their general use, little is known about the extent to which the degree of protein interaction determined by two-hybrid approaches parallels the degree of interaction determined by biochemical techniques. In this study, we used a set of lexAop-LEU2 and lexAop-lacZ reporters to calibrate the interaction trap. For the calibration, we used two sets of proteins, the Myc-Max-Mxi1 helix-loop-helix proteins, and wild-type and dimerization-defective versions of the lambda cI repressor. Our results indicate that the strength of interaction as predicted by the two-hybrid approach generally correlates with that determined in vitro, permitting discrimination of high-, intermediate-, and low-affinity interactions, but there was no single reporter for which the amount of gene expression linearly reflected affinity measured in vitro. However, some reporters showed thresholds and only responded to stronger interactions. Finally, some interactions were subject to directionality, and their apparent strength depended on the reporter used. Taken together, our results provide a cautionary framework for interpreting affinities from two-hybrid experiments.Since their introduction, the interaction trap and other two-hybrid systems have been used to study protein-protein interactions. Despite their general use, little is known about the extent to which the degree of protein interaction determined by two-hybrid approaches parallels the degree of interaction determined by biochemical techniques. In this study, we used a set of lexAop-LEU2 and lexAop-lacZ reporters to calibrate the interaction trap. For the calibration, we used two sets of proteins, the Myc-Max-Mxi1 helix-loop-helix proteins, and wild-type and dimerization-defective versions of the lambda cI repressor. Our results indicate that the strength of interaction as predicted by the two-hybrid approach generally correlates with that determined in vitro, permitting discrimination of high-, intermediate-, and low-affinity interactions, but there was no single reporter for which the amount of gene expression linearly reflected affinity measured in vitro. However, some reporters showed thresholds and only responded to stronger interactions. Finally, some interactions were subject to directionality, and their apparent strength depended on the reporter used. Taken together, our results provide a cautionary framework for interpreting affinities from two-hybrid experiments.
Since their introduction, the interaction trap and other two-hybrid systems have been used to study protein-protein interactions. Despite their general use, little is known about the extent to which the degree of protein interaction determined by two-hybrid approaches parallels the degree of interaction determined by biochemical techniques. In this study, we used a set of lexAop-LEU2 and lexAop-lacZ reporters to calibrate the interaction trap. For the calibration, we used two sets of proteins, the Myc-Max-Mxi1 helix-loop-helix proteins, and wild-type and dimerization-defective versions of the lambda cI repressor. Our results indicate that the strength of interaction as predicted by the two-hybrid approach generally correlates with that determined in vitro, permitting discrimination of high-, intermediate-, and low-affinity interactions, but there was no single reporter for which the amount of gene expression linearly reflected affinity measured in vitro. However, some reporters showed thresholds and only responded to stronger interactions. Finally, some interactions were subject to directionality, and their apparent strength depended on the reporter used. Taken together, our results provide a cautionary framework for interpreting affinities from two-hybrid experiments.
Article Usage Stats Services MCB Citing Articles Google Scholar PubMed Related Content Social Bookmarking CiteULike Delicious Digg Facebook Google+ Mendeley Reddit StumbleUpon Twitter current issue Spotlights in the Current Issue MCB About MCB Subscribers Authors Reviewers Advertisers Inquiries from the Press Permissions & Commercial Reprints ASM Journals Public Access Policy MCB RSS Feeds 1752 N Street N.W. • Washington DC 20036 202.737.3600 • 202.942.9355 fax • journals@asmusa.org Print ISSN: 0270-7306 Online ISSN: 1098-5549 Copyright © 2014 by the American Society for Microbiology.   For an alternate route to MCB .asm.org, visit: MCB       
Author R Brent
E A Golemis
J Estojak
AuthorAffiliation Fox Chase Cancer Center, Philadelphia, Pennsylvania 19111, USA
AuthorAffiliation_xml – name: Fox Chase Cancer Center, Philadelphia, Pennsylvania 19111, USA
Author_xml – sequence: 1
  givenname: Joanne
  surname: Estojak
  fullname: Estojak, Joanne
  organization: Fox Chase Cancer Center
– sequence: 2
  givenname: Roger
  surname: Brent
  fullname: Brent, Roger
  organization: Department of Genetics, Harvard Medical School
– sequence: 3
  givenname: Erica A.
  surname: Golemis
  fullname: Golemis, Erica A.
  email: EA_Golemis@fccc.edu
  organization: Fox Chase Cancer Center
BackLink https://www.ncbi.nlm.nih.gov/pubmed/7565735$$D View this record in MEDLINE/PubMed
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Snippet Article Usage Stats Services MCB Citing Articles Google Scholar PubMed Related Content Social Bookmarking CiteULike Delicious Digg Facebook Google+ Mendeley...
Since their introduction, the interaction trap and other two-hybrid systems have been used to study protein-protein interactions. Despite their general use,...
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StartPage 5820
SubjectTerms Bacterial Proteins - genetics
Base Sequence
beta-Galactosidase - genetics
DNA - metabolism
DNA-Binding Proteins - metabolism
Genes, Reporter - genetics
Helix-Loop-Helix Motifs
Kinetics
Leucine
Molecular Sequence Data
Mutation
Operator Regions, Genetic
phage lambda
Protein Binding
Recombinant Fusion Proteins - biosynthesis
Repressor Proteins - genetics
Repressor Proteins - metabolism
Saccharomyces cerevisiae - genetics
Serine Endopeptidases
Transcriptional Activation
Viral Proteins
Viral Regulatory and Accessory Proteins
Title Correlation of two-hybrid affinity data with in vitro measurements
URI http://mcb.asm.org/content/15/10/5820.abstract
https://www.tandfonline.com/doi/abs/10.1128/MCB.15.10.5820
https://www.ncbi.nlm.nih.gov/pubmed/7565735
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https://pubmed.ncbi.nlm.nih.gov/PMC230834
Volume 15
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