Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2000-2-10
pubmed:abstractText
T4 gene 2 mutants have a pleiotropic phenotype: degradation of injected phage DNA by exonuclease V (ExoV) in the recBCD(+) host cell cytoplasm and a low burst size due, at least in part, to a decreased ability for head-to-tail (H-T) joining. The more N terminal the mutation, the more pronounced is the H-T joining defect. We have overexpressed and purified the recombinant gene 2 product (rgp2) to homogeneity in order to test its role in H-T joining, during in vitro reconstitution. When we mix extracts of heads from a gp2(+) phage infection (H(+)) with tails from a gp2(+) or gp2(-) phage infection (T(+) or T(-)), the H-T joining is fast and all of the reconstituted phage grow equally well on cells with or without ExoV activity. When heads from gene 2 amber mutants (H(-)) are used, addition of rgp2 is required for H-T joining. In this case, H-T joining is slow and only about 10% of the reconstituted phage can form plaques on ExoV(+) cells. When extracts of heads with different gene 2 amber mutations are mixed with extracts of tails (with a gene 2 amber mutation) in the presence of rgp2, we find that the size of the gp2 amber peptide of the head extract is inversely related to the fraction of reconstituted phage with a 2(+) phenotype. We conclude that free rgp2 is biologically active and has a direct role in H-T joining but that the process is different from H-T joining promoted by natural gp2 that is incorporated into the head in vivo. Furthermore, it seems that gp2 has a domain which binds it to the head. Thus, the presence of the longer gp2am mutants (with this domain) inhibits their replacement by full-length rgp2.
pubmed:grant
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-126236, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-1917885, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-2023259, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-2167662, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-2644202, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-2740234, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-2943636, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-2945162, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-2961561, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-3156376, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-3537305, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-3603026, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-388439, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-4057254, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-4109483, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-4563261, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-4868421, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-4878023, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-4887878, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-5432063, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-592405, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-6259625, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-6268842, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-6997493, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-7028099, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-7054146, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-768782, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-768783, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-779242, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-779243, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-942051, http://linkedlifedata.com/resource/pubmed/commentcorrection/10633100-9973367
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0021-9193
pubmed:author
pubmed:issnType
Print
pubmed:volume
182
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
672-9
pubmed:dateRevised
2009-11-18
pubmed:meshHeading
pubmed:year
2000
pubmed:articleTitle
Bacteriophage T4 self-assembly: in vitro reconstitution of recombinant gp2 into infectious phage.
pubmed:affiliation
Department of Molecular Biology and Microbiology, Tufts University School of Medicine, Boston, Massachusetts 02111, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S.