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The Phycomyces madA gene encodes a blue-light photoreceptor for phototropism and other light responses


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dc.creator Idnurm, Alexander
dc.creator Rodríguez Romero, Julio
dc.creator Corrochano Peláez, Luis María
dc.creator Sanz, Catalina
dc.creator Iturriaga, Enrique A.
dc.creator Eslava, Arturo P.
dc.creator Heitman, Joseph 2015-10-07T06:58:17Z 2015-10-07T06:58:17Z 2006
dc.identifier.issn 1091-6490 es
dc.identifier.issn 0027-8424 es
dc.description.abstract Phycomyces blakesleeanus is a filamentous zygomycete fungus that produces striking elongated single cells that extend up to 10 cm into the air, with each such sporangiophore supporting a sphere containing the spores for dispersal. This organism has served as a model for the detection of environmental signals as diverse as light, chemicals, touch, wind, gravity, and adjacent objects. In particular, sporangiophore growth is regulated by light, and it exhibits phototropism by bending toward near-UV and blue wavelengths and away from far-UV wavelengths in a manner that is physiologically similar to plant phototropic responses. The Phycomyces madA mutants were first isolated more than 40 years ago, and they exhibit reduced sensitivity to light. Here, we identify two (duplicated) homologs in the White Collar 1 family of blue-light photoreceptors in Phycomyces. We describe that the madA mutant strains contain point mutations in one of these genes and that these mutations cosegregate with a defect in phototropism after genetic crosses. Thus, the phototropic responses of fungi through madA and plants through phototropin rely on diverse proteins; however, these proteins share a conserved flavin-binding domain for photon detection. es
dc.format application/pdf es
dc.language.iso eng es
dc.publisher National Academy of Sciences es
dc.relation.ispartof Proceedings of the National Academy of Sciences of the United States of America, 103(12), 4546-4551 es
dc.rights Attribution-NonCommercial-NoDerivatives 4.0 Internacional *
dc.rights.uri *
dc.subject light es
dc.subject oxygen es
dc.subject or voltage domain es
dc.subject Max Delbrück es
dc.subject photosensor es
dc.subject White Collar 1 es
dc.subject evolution es
dc.title The Phycomyces madA gene encodes a blue-light photoreceptor for phototropism and other light responses es
dc.type info:eu-repo/semantics/article es
dc.rights.accessrights info:eu-repo/semantics/openAccess es
dc.contributor.affiliation Universidad de Sevilla. Departamento de Genética es
dc.relation.publisherversion es
dc.identifier.doi es
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