pubmed-article:9530508 | rdf:type | pubmed:Citation | lld:pubmed |
pubmed-article:9530508 | lifeskim:mentions | umls-concept:C0995533 | lld:lifeskim |
pubmed-article:9530508 | lifeskim:mentions | umls-concept:C0136979 | lld:lifeskim |
pubmed-article:9530508 | lifeskim:mentions | umls-concept:C1521970 | lld:lifeskim |
pubmed-article:9530508 | lifeskim:mentions | umls-concept:C1280500 | lld:lifeskim |
pubmed-article:9530508 | lifeskim:mentions | umls-concept:C0026377 | lld:lifeskim |
pubmed-article:9530508 | lifeskim:mentions | umls-concept:C0014274 | lld:lifeskim |
pubmed-article:9530508 | lifeskim:mentions | umls-concept:C1519755 | lld:lifeskim |
pubmed-article:9530508 | lifeskim:mentions | umls-concept:C1515926 | lld:lifeskim |
pubmed-article:9530508 | lifeskim:mentions | umls-concept:C0044609 | lld:lifeskim |
pubmed-article:9530508 | pubmed:issue | 2 | lld:pubmed |
pubmed-article:9530508 | pubmed:dateCreated | 1998-4-28 | lld:pubmed |
pubmed-article:9530508 | pubmed:abstractText | Phycobilisomes (PBS), the major light harvesting antenna of the cyanobacterium Synechococcus contain phycocyanin (PC) and allophycocyanin (APC) as major pigment-protein complexes. PBS also absorb ultraviolet-B (280-320 nm) radiation. Exposure of Synechococcus PBS to low dose of UV-B (approximately 0.28 mw.cm-2) for 90 min induced change in absorption, emission and excitation characteristics of PBS and these changes got enhanced after 3 h of exposure. Room temperature excitation and emission spectra clearly indicated uncoupling of energy transfer from PC to APC on exposure to UV-B. Also, the 77K emission spectra suggested that F682 emission originating from APC decreased by 42% after 3 h of exposure. Circular dichroism (CD) spectra of UV-B exposed PBS indicated changes (14% decrease) in the alpha-helical content after 90 min treatment. SDS-PAGE analysis indicated degradation of a 75 kDa polypeptide (which appear to be a linker polypeptide) on UV-B treatment. The degradation of this polypeptide seems to induce changes in pigment-protein interaction and decoupling of energy transfer within the PBS. Our results for the first time clearly indicate that the PBS of Synechococcus are targets for UV-B damage. | lld:pubmed |
pubmed-article:9530508 | pubmed:language | eng | lld:pubmed |
pubmed-article:9530508 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
pubmed-article:9530508 | pubmed:citationSubset | IM | lld:pubmed |
pubmed-article:9530508 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
pubmed-article:9530508 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
pubmed-article:9530508 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
pubmed-article:9530508 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
pubmed-article:9530508 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
pubmed-article:9530508 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
pubmed-article:9530508 | pubmed:status | MEDLINE | lld:pubmed |
pubmed-article:9530508 | pubmed:month | Feb | lld:pubmed |
pubmed-article:9530508 | pubmed:issn | 1039-9712 | lld:pubmed |
pubmed-article:9530508 | pubmed:author | pubmed-author:SrivastavaMM | lld:pubmed |
pubmed-article:9530508 | pubmed:author | pubmed-author:MohantyPP | lld:pubmed |
pubmed-article:9530508 | pubmed:author | pubmed-author:TeeK SKS | lld:pubmed |
pubmed-article:9530508 | pubmed:author | pubmed-author:KrishnaK BKB | lld:pubmed |
pubmed-article:9530508 | pubmed:issnType | Print | lld:pubmed |
pubmed-article:9530508 | pubmed:volume | 44 | lld:pubmed |
pubmed-article:9530508 | pubmed:owner | NLM | lld:pubmed |
pubmed-article:9530508 | pubmed:authorsComplete | Y | lld:pubmed |
pubmed-article:9530508 | pubmed:pagination | 245-57 | lld:pubmed |
pubmed-article:9530508 | pubmed:dateRevised | 2006-11-15 | lld:pubmed |
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pubmed-article:9530508 | pubmed:year | 1998 | lld:pubmed |
pubmed-article:9530508 | pubmed:articleTitle | Effects of ultraviolet-B radiation on phycobilisomes of Synechococcus PCC 7942: alterations in conformation and energy transfer characteristics. | lld:pubmed |
pubmed-article:9530508 | pubmed:affiliation | School of Life Sciences, Jawaharlal Nehru University, New Delhi, India. | lld:pubmed |
pubmed-article:9530508 | pubmed:publicationType | Journal Article | lld:pubmed |
pubmed-article:9530508 | pubmed:publicationType | Research Support, Non-U.S. Gov't | lld:pubmed |