| pubmed-article:12455986 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:12455986 | lifeskim:mentions | umls-concept:C0027923 | lld:lifeskim |
| pubmed-article:12455986 | lifeskim:mentions | umls-concept:C0036864 | lld:lifeskim |
| pubmed-article:12455986 | lifeskim:mentions | umls-concept:C0024501 | lld:lifeskim |
| pubmed-article:12455986 | lifeskim:mentions | umls-concept:C0887848 | lld:lifeskim |
| pubmed-article:12455986 | lifeskim:mentions | umls-concept:C0205307 | lld:lifeskim |
| pubmed-article:12455986 | lifeskim:mentions | umls-concept:C0441889 | lld:lifeskim |
| pubmed-article:12455986 | lifeskim:mentions | umls-concept:C1527148 | lld:lifeskim |
| pubmed-article:12455986 | lifeskim:mentions | umls-concept:C2362546 | lld:lifeskim |
| pubmed-article:12455986 | lifeskim:mentions | umls-concept:C1546857 | lld:lifeskim |
| pubmed-article:12455986 | lifeskim:mentions | umls-concept:C1556066 | lld:lifeskim |
| pubmed-article:12455986 | lifeskim:mentions | umls-concept:C1619636 | lld:lifeskim |
| pubmed-article:12455986 | lifeskim:mentions | umls-concept:C1514873 | lld:lifeskim |
| pubmed-article:12455986 | pubmed:dateCreated | 2002-11-28 | lld:pubmed |
| pubmed-article:12455986 | pubmed:abstractText | The genome of the filamentous fungus Neurospora crassa contains a single gene encoding a heterotrimeric G-protein beta subunit, gnb-1. The predicted GNB-1 protein sequence is most identical to G beta proteins from the filamentous fungi Cryphonectria parasitica and Aspergillus nidulans. N. crassa GNB-1 is also 65% identical to the human GNB-1 protein but only 38 and 45% identical to G beta proteins from budding and fission yeasts. Previous studies in animal and fungal systems have elucidated phenotypes of G beta null mutants, but little is known about the effects of G beta loss on G alpha levels. In this study, we analyzed a gnb-1 deletion mutant for cellular phenotypes and levels of the three G alpha proteins. Delta gnb-1 strains are female-sterile, with production of aberrant fertilized reproductive structures. Delta gnb-1 strains conidiate more profusely and have altered mass on solid medium. Loss of gnb-1 leads to inappropriate conidiation and expression of a conidiation-specific gene during growth in submerged culture. Intracellular cyclic AMP levels are reduced by 60% in vegetative plate cultures of delta gnb-1 mutants. Loss of gnb-1 leads to lower levels of the three G alpha proteins under a variety of conditions. Analysis of transcript levels for the gna-1 and gna-2 G alpha genes in submerged cultures indicates that regulation of G alpha protein levels by gnb-1 is posttranscriptional. The results suggest that GNB-1 directly regulates apical extension rate and mass accumulation. In contrast, many other delta gnb-1 phenotypes, including female sterility and defective conidiation, can be explained by altered levels of the three N. crassa G alpha proteins. | lld:pubmed |
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| pubmed-article:12455986 | pubmed:language | eng | lld:pubmed |
| pubmed-article:12455986 | pubmed:citationSubset | IM | lld:pubmed |
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| pubmed-article:12455986 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:12455986 | pubmed:author | pubmed-author:YangQiQ | lld:pubmed |
| pubmed-article:12455986 | pubmed:author | pubmed-author:PooleSheven... | lld:pubmed |
| pubmed-article:12455986 | pubmed:author | pubmed-author:BorkovichKath... | lld:pubmed |
| pubmed-article:12455986 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:12455986 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:12455986 | pubmed:pagination | 378-90 | lld:pubmed |
| pubmed-article:12455986 | pubmed:dateRevised | 2009-11-19 | lld:pubmed |
| pubmed-article:12455986 | pubmed:articleTitle | A G-protein beta subunit required for sexual and vegetative development and maintenance of normal G alpha protein levels in Neurospora crassa. | lld:pubmed |
| pubmed-article:12455986 | pubmed:affiliation | Department of Microbiology and Molecular Genetics, University of Texas-Houston Medical School, Houston, Texas 77030, USA. | lld:pubmed |
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