| pubmed-article:9925510 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:9925510 | lifeskim:mentions | umls-concept:C0030705 | lld:lifeskim |
| pubmed-article:9925510 | lifeskim:mentions | umls-concept:C0010674 | lld:lifeskim |
| pubmed-article:9925510 | lifeskim:mentions | umls-concept:C0018483 | lld:lifeskim |
| pubmed-article:9925510 | lifeskim:mentions | umls-concept:C1167331 | lld:lifeskim |
| pubmed-article:9925510 | lifeskim:mentions | umls-concept:C1325742 | lld:lifeskim |
| pubmed-article:9925510 | lifeskim:mentions | umls-concept:C0542341 | lld:lifeskim |
| pubmed-article:9925510 | lifeskim:mentions | umls-concept:C0205419 | lld:lifeskim |
| pubmed-article:9925510 | lifeskim:mentions | umls-concept:C0486616 | lld:lifeskim |
| pubmed-article:9925510 | lifeskim:mentions | umls-concept:C0205164 | lld:lifeskim |
| pubmed-article:9925510 | lifeskim:mentions | umls-concept:C0137956 | lld:lifeskim |
| pubmed-article:9925510 | pubmed:issue | 2 | lld:pubmed |
| pubmed-article:9925510 | pubmed:dateCreated | 1999-4-21 | lld:pubmed |
| pubmed-article:9925510 | pubmed:databankReference | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:9925510 | pubmed:databankReference | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:9925510 | pubmed:abstractText | We investigated the relationship between susceptibility to beta-lactam antibiotics and variation in the major outer membrane protein P2 (OmpP2; also called porin) of persistent nonencapsulated Haemophilus influenzae isolated from cystic fibrosis patients. Nine OmpP2 variants were selected from two distinct H. influenzae strains from two patients extensively treated with beta-lactam antibiotics. The variants differed in their susceptibilities to at least two beta-lactam antibiotics. By detergent extraction and column chromatography, OmpP2 was purified from two variants that were derived from strain 70 and that differed notably in their susceptibilities to beta-lactam antibiotics. The proteins were reconstituted into black lipid membranes for measurement of porin function. OmpP2 from the more resistant isolate (isolate 70b) had a smaller channel conductance than OmpP2 of the more susceptible isolate (isolate 70f). DNA sequencing of ompP2 of these isolates revealed single nonsynonymous base differences; there were changes in the amino acid sequence corresponding to surface-exposed loops 4, 5, 6, and 8. Changes in loops 4, 5, and 6 were previously shown to result in antigenic differences. Beside these mutations, variants of strain 70 showed additional mutations in loop 1 and nonexposed loop 3. Taken together, our results suggest that in variants of strain 70, nonsynonymous point mutations accumulated both in the sequences of ompP2 coding for antigen-variable loops and in other loops, notably, loops 1 and 3. The latter changes are suggested to affect the permeability of the porin channel. | lld:pubmed |
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| pubmed-article:9925510 | pubmed:language | eng | lld:pubmed |
| pubmed-article:9925510 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:9925510 | pubmed:citationSubset | IM | lld:pubmed |
| pubmed-article:9925510 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:9925510 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
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| pubmed-article:9925510 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:9925510 | pubmed:month | Feb | lld:pubmed |
| pubmed-article:9925510 | pubmed:issn | 0066-4804 | lld:pubmed |
| pubmed-article:9925510 | pubmed:author | pubmed-author:DankertJJ | lld:pubmed |
| pubmed-article:9925510 | pubmed:author | pubmed-author:DahanDD | lld:pubmed |
| pubmed-article:9925510 | pubmed:author | pubmed-author:Van AlphenLL | lld:pubmed |
| pubmed-article:9925510 | pubmed:author | pubmed-author:CoultonJ WJW | lld:pubmed |
| pubmed-article:9925510 | pubmed:author | pubmed-author:MöllerL VLV | lld:pubmed |
| pubmed-article:9925510 | pubmed:author | pubmed-author:EijkPP | lld:pubmed |
| pubmed-article:9925510 | pubmed:author | pubmed-author:RegelinkA GAG | lld:pubmed |
| pubmed-article:9925510 | pubmed:author | pubmed-author:Van UlsenPP | lld:pubmed |
| pubmed-article:9925510 | pubmed:issnType | Print | lld:pubmed |
| pubmed-article:9925510 | pubmed:volume | 43 | lld:pubmed |
| pubmed-article:9925510 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:9925510 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:9925510 | pubmed:pagination | 226-32 | lld:pubmed |
| pubmed-article:9925510 | pubmed:dateRevised | 2009-11-18 | lld:pubmed |
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