Identification of mip-like genes in the genus Legionella
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Identification of mip-like genes in the genus Legionella. / Cianciotto, N P; Bangsborg, Jette Marie; Eisenstein, B I; Engleberg, N C.
I: Infection and Immunity, Bind 58, Nr. 9, 1990, s. 2912-8.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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T1 - Identification of mip-like genes in the genus Legionella
AU - Cianciotto, N P
AU - Bangsborg, Jette Marie
AU - Eisenstein, B I
AU - Engleberg, N C
PY - 1990
Y1 - 1990
N2 - The mip gene of Legionella pneumophila serogroup 1 strain AA100 encodes a 24-kilodalton surface protein (Mip) and enhances the abilities of L. pneumophila to parasitize human macrophages and to cause pneumonia in experimental animals. To determine whether this virulence factor is conserved in the genus Legionella, a large panel of Legionella strains was examined by Southern hybridization and immunoblot analyses for the presence and expression of mip-related sequences. Strains representing all 14 serogroups of L. pneumophila contained a mip gene and expressed a 24-kilodalton Mip protein. Although the isolates of the 29 other Legionella species did not hybridize with mip DNA probes under high-stringency conditions, they did so at reduced stringency. In support of the notion that these strains possess mip-like genes, these species each expressed a protein (24 to 31 kilodaltons in size) that reacted with specific Mip antisera. Moreover, the cloned mip analog from Legionella micdadei encoded the cross-reactive protein. Thus, mip is conserved and specific to L. pneumophila, but mip-like genes are present throughout the genus, perhaps potentiating the intracellular infectivity of all Legionella species.
AB - The mip gene of Legionella pneumophila serogroup 1 strain AA100 encodes a 24-kilodalton surface protein (Mip) and enhances the abilities of L. pneumophila to parasitize human macrophages and to cause pneumonia in experimental animals. To determine whether this virulence factor is conserved in the genus Legionella, a large panel of Legionella strains was examined by Southern hybridization and immunoblot analyses for the presence and expression of mip-related sequences. Strains representing all 14 serogroups of L. pneumophila contained a mip gene and expressed a 24-kilodalton Mip protein. Although the isolates of the 29 other Legionella species did not hybridize with mip DNA probes under high-stringency conditions, they did so at reduced stringency. In support of the notion that these strains possess mip-like genes, these species each expressed a protein (24 to 31 kilodaltons in size) that reacted with specific Mip antisera. Moreover, the cloned mip analog from Legionella micdadei encoded the cross-reactive protein. Thus, mip is conserved and specific to L. pneumophila, but mip-like genes are present throughout the genus, perhaps potentiating the intracellular infectivity of all Legionella species.
KW - Bacterial Proteins
KW - Base Sequence
KW - DNA, Bacterial
KW - Gene Expression
KW - Genes, Bacterial
KW - Humans
KW - Legionella
KW - Legionellosis
KW - Macrophages
KW - Membrane Proteins
KW - Virulence
M3 - Journal article
C2 - 2387627
VL - 58
SP - 2912
EP - 2918
JO - Infection and Immunity
JF - Infection and Immunity
SN - 0019-9567
IS - 9
ER -
ID: 40334346