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Topic: Mating type

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	Mating of yeast - Wikipedia, the free encyclopedia
		Mating type is determined by a single locus, MAT, which in turn governs the sexual behaviour of both haploid and diploid cells.
		Combined with the strong drive for haploid cells to mate with cells of the opposite mating type and form diploids, mating type switching and consequent mating will cause the majority of cells in a colony to be diploid, regardless of whether a haploid or diploid cell founded the colony.
		The process of mating type switching is a gene conversion event initiated by the HO gene.
	en.wikipedia.org /wiki/Mating_of_yeast (1414 words)

	Mating type gene homologues in Aspergillus fumigatus -- Varga 149 (4): 816 -- Microbiology
		Mating type gene homologues in Aspergillus fumigatus -- Varga 149 (4): 816 -- Microbiology
		Identification of a mating type gene homologue in A.
		of a mating type gene homologue in A.
	mic.sgmjournals.org /cgi/content/full/149/4/816 (1515 words)

	Mating type abstracts
		In the mating process, pheromones facilitate the donation of migrating nuclei from an individual to a compatible mate while the pheromone-receptor regulates the acceptance of migrating nuclei from a mate.
		Protein profiles of single mating type isolates induced with SF and individually picked fertile apothecia revealed the presence of a major protein termed sex factor induced (SFI 1) protein which was absent in asexually reproducing cultures.
		Characterization of mating type genes in homothallic ascomycetes.
	www.fgsc.net /asilomar1997/mating.html (3270 words)

	Mating Type Donor Preference in Yeast
		The two mating types can mate with each other to form an a/alpha diploid that can undergo meiosis (and DNA recombination) resulting in four meiotic products or haploid spores.
		To accomplish this, the MAT locus, which controls the cell’s mating type, is changed from an a-specific sequence to an alpha-specific sequence or vice versa by gene conversion induced by the HO endonuclease (see Introduction).
		This suggests Mcm1p is responsible for removing nucleosomes from the RE region and that the binding of the alpha2 protein aids in positioning the phased nucleosomes.
	www.bio.brandeis.edu /haberlab/jehsite/donorprf.html (534 words)

	Chlamydomonas mating
		This activated mating structure is analogous to the acrosome found on sperm (the first sperm component to react with the egg).
		Cells of the other mating type may carry the gene but do not express it, presumably because the gene is for a function specific to only one mating type.
		Chlamydomonas, the mating structures also appear to be covered with a glycoprotein that is involved in the adhesion of these gametes.
	www.mindspring.com /~charlenef/id1.html (636 words)

	ARS \| Publication request: Cloning and Analysis of the Mating-Type Idiomorphs from the Barley Pathogenseptoria ...
		The common occurrence of both mating types on the same leaf and high levels of genetic diversity indicate that S. passerinii almost certainly is not an asexual derivative of M. graminicola.
		Both mating types were present in approximately equal frequencies, often among multiple isolates from the same leaves.
		The common occurrence of both mating types on the same leaf and high levels of genotypic diversity indicate that S. passerinii almost certainly is not an asexual derivative of M. graminicola.
	www.ars.usda.gov /research/publications/publications.htm?SEQ_NO_115=131772&pf=1 (622 words)

	Mating type switching in fission yeast: A unique model system of development and differentiation (Site not responding. Last check: 2007-10-25)
		Thus, a cell with the a mating type can switch to a and vice versa, in a highly regulated manner, such that two out of four granddaughters, which are sister cells, switch to the opposite mating type.
		The hallmark of the cassette organization of mating type loci is that the cellular phenotype of P or M is dictated by the allele present at mat1 since the donor loci mat2 and mat3 are transcriptionally silent.
		Mating type switching is a highly interesting system of development and differentation, whose molecular basis has been well characterized.
	www.ias.ac.in /currsci/nov25/articles15.htm (5609 words)

	Tetrahymena Genetics
		This is the stage at which site-specific DNA rearrangements and mating type determination (discussed in the text) occur in the MAC.
		In the wild, the frequencies of the seven mating types tend to be equal and conjugation seems to occur frequently [9].
		A seemingly unrelated type of site-specific rearrangement involves the deletion of internal DNA segments from the MAC during its differentiation.
	www.ciliate.org /genetics.shtml (7530 words)

	Diploids, tetrads, and random spore analysis
		One of the most common questions we get is "why won't my diploid behave?" This page provides information on the nuts'n'bolts of genetic analysis: mating types and crosses, making diploids, working with h90 strains, and analysing meiotic products by random spore analysis or by tetrad dissection.
		Asci produced from direct mating and meiosis are typically curved in a zig-zag or a banana shape (see h90 picture).
		However, in pombe, the mutations in mating type are not in the switching apparatus (as in an ho mutant, which lacks an endonuclease), but in the mating type locus itself.
	www-rcf.usc.edu /~forsburg/diploids.html (2238 words)

	Mapping of the Cryptococcus neoformans MATalpha Locus: Presence of Mating Type-Specific Mitogen-Activated Protein ...
		Overlapping cosmids covering the whole mating type locus were isolated and analyzed.
		Probes A (GTP binding protein) and J (RNA polymerase) are located outside the mating type locus which hybridized with the DNA of both mating types.
		of the a mating type-specific pheromone receptor gene,
	jb.asm.org /cgi/content/full/182/21/6222 (3423 words)

	Same-sex mating discovered in an infectious fungus
		In fungi, however, sexual identity is determined by so-called "mating type loci," genes arranged contiguously, but which typically do not span an entire chromosome.
		neoformans exists in two mating types, a and alpha, determined by a single genetic region, or locus.
		The newly described mating strategy might allow a single mating strain to expand rapidly by cell division, yet retain its ability to generate diversity by undergoing sex, said Heitman.
	www.medicalnewstoday.com /medicalnews.php?newsid=23181 (764 words)

	Mating Type Evolution
		Although selfing in the lab is rare, 5 individuals have selfed, and the progeny of lab selfs segregate for mating type, based on both mating phenotype and HMG hybridizations.
		However, Mn19 was isolated as a monokaryotic strain of the (+) mating type.
		Wild type (un-rearranged) sequences have been amplified from the majority of the progeny, though the rearrangement was transmitted to some strains.
	www.fgsc.net /asilomar/matevol.html (762 words)

	A Novel Function of the DNA Repair Gene rhp6 in Mating-Type Silencing by Chromatin Remodeling in Fission Yeast -- Singh ...
		Repression of a mating type cassette in the fission yeast by four DNA elements.
		The switching gene swi6 affects recombination and gene expression in the mating type region of Schizosaccharomyces pombe.
		Role of DNA replication in the repression of silent mating type loci in yeast.
	mcb.asm.org /cgi/content/full/18/9/5511 (7631 words)

	Genetics
		The frequencies with which various mating types arise are not necessarily equal, and are affected by environmental conditions prevailing at the time of MAC differentiation, e.g.
		It explains quantitatively the genetic phenomenology of mating type determination and predicts the order of mating type genes within the mat locus, but remains to be tested molecularly.
		Such a life cycle and type of nuclear dimorphism is found today among certain living Foraminifera [25], a group of shelled, marine unicellular eukaryotes.
	www.lifesci.ucsb.edu /~genome/Tetrahymena/genetics.htm (7567 words)

	The Mating-Type Proteins of Fission Yeast Induce Meiosis by Directly Activating mei3 Transcription -- van Heeckeren et ...
		Cell type control of meiotic gene regulation in the budding yeast Saccharomyces cerevisiae is mediated by a cascade of transcriptional
		cerevisiae, cell type control of meiotic gene regulation is mediated by transcriptional repression (20).
		Mating pheromone-induced expression of the mat1-Pm gene of Schizosaccharomyces pombe: identification of signalling components and characterization of upstream controlling elements.
	mcb.asm.org /cgi/content/full/18/12/7317 (5736 words)

	Identification of a Mating Type-Like Locus in the Asexual Pathogenic Yeast Candida albicans -- Hull and Johnson 285 ...
		Effects of Ploidy and Mating Type on Virulence of Candida albicans.
		MF{alpha}1, the Gene Encoding the {alpha} Mating Pheromone of Candida albicans.
		Induction of Mating in Candida albicans by Construction of MTLa and MTLalpha Strains.
	www.sciencemag.org /cgi/content/abstract/285/5431/1271 (1298 words)

	Cryptococcus neoformans mating-type region (Site not responding. Last check: 2007-10-25)
		The boundaries of the mating type alleles were defined by comparison between the two mating types of each serotype.
		The positions of unannotated genes and their introns within the mating type sequences were determined via several steps.
		The equivalent genes from each mating type and serotype were then aligned and the conservation of the introns compared.
	cneo.genetics.duke.edu /mating-type (307 words)

	The Chlamydomonas Fus1 Protein Is Present on the Mating Type plus Fusion Organelle and Required for a Critical Membrane ...
		The Chlamydomonas Fus1 Protein Is Present on the Mating Type plus Fusion Organelle and Required for a Critical Membrane Adhesion Event during Fusion with minus Gametes -- Misamore et al.
		Ferris, P.J., Armbrust, E.V., and Goodenough, U.W. Genetic structure of the mating type locus of Chlamydomonas reinhardtii.
		Ferris, P.J., and Goodenough, U.W. Mating type in Chlamydomonas is specified by mid, the minus-dominance gene.
	www.molbiolcell.org /cgi/content/full/14/6/2530 (7274 words)

	Schizophyllum commune, the split gill fungus, perhaps the world's most widespread fungus-- and possessor of over 28,000 ...
		The mating type is determined in this case by a single genetic locus with two alleles.
		This encourages a spore not to mate with its siblings, or encourages outbreeding in a population.
		Mating type studies in fungi are still ongoing and there's much more to be learned about the subject, especially on a DNA and enzyme level.
	botit.botany.wisc.edu /toms_fungi/feb2000.html (1475 words)

	Phenotypic Switching and Mating Type Switching of Candida glabrata at Sites of Colonization -- Brockert et al. 71 (12): ... (Site not responding. Last check: 2007-10-25)
		Note also the single mating type switch from class I to class II in isolate vDB-P of patient P1.
		Southern blot hybridization analyses with probes for the MTL1 locus and the MTLa1 ORF support the conclusion that a mating type switch is responsible for the vDB-P pattern.
		MTL genes at the MTL1 locus of the mating type a and
	iai.asm.org /cgi/content/full/71/12/7109 (5672 words)

	Relationship between Monokaryotic Growth Rate and Mating Type in the Edible Basidiomycete Pleurotus ostreatus -- ...
		Molecular techniques, mating, and linkage analysis were performed as described by Larraya et al.
		The frequency of intralocus recombination yielding new (i.e., nonparental) B types is an estimate of the intergenic linkage
		Kothe, E. Mating types and pheromone recognition in the Homobasidiomycete Schizophyllum commune.
	aem.asm.org /cgi/content/full/67/8/3385 (3046 words)

	Intuitive Thinker (NT)Analyst
		Typically, ANALYST mates will encourage each other to continue the formal education process, and you'll find a disproportionate number of ANALYST couples doing the ``working their way through school together'' trip, especially in highly technical or specialized fields, such as science, medicine, and law.
		And, of course, that usually requires that the counselor, too, be an ANALYST type, who may fall right into believing the couple's persuasive intellectual defenses and never expose the fears and other emotional concerns at the root of their well- disguised conflict.
		These diverse types are intelligent in different ways from the ANALYST, and, frankly, the ANALYST usually regards their intelligence to be of an inferior variety.
	look.net /success/NT (2193 words)

	Effects of Ploidy and Mating Type on Virulence of Candida albicans -- Ibrahim et al. 73 (11): 7366 -- Infection and ... (Site not responding. Last check: 2007-10-25)
		Effects of Ploidy and Mating Type on Virulence of Candida albicans -- Ibrahim et al.
		Nuclear fusion occurs during mating in Candida albicans and is dependent on the KAR3 gene.
		Identification of a mating type-like locus in the asexual pathogenic yeast Candida albicans.
	iai.asm.org /cgi/content/full/73/11/7366 (4779 words)

	\|\| DukeMedNews \|\| Same-Sex Mating by Fungi Spawned Infection Outbreak, Evidence Suggests
		After extensive genetic analysis of fungal samples, the researchers suggest that mating between two less harmful fungal strains of the same sex or "mating type" produced the more virulent form.
		Cryptococcus exists in two mating types, "a" and "alpha," determined by a single genetic region, or locus.
		Additional examination of the mating type locus provided evidence that the major outbreak isolate may have resulted from same-sex mating, Heitman added.
	www.dukemednews.org /news/article.php?id=9283 (967 words)

	alpha 2p controls donor preference during mating type interconversion in yeast by inactivating a recombinational ...
		The transcriptionally silent mating type loci, HML and HMR, are
		Because a yeast cell selects one mating type donor locus in preference to the other as a function of cell type, the cell is
		Homothallic switching of yeast mating type cassettes is initiated by a double-stranded cut in the MAT locus.
	www.genesdev.org /cgi/content/full/11/15/1899 (6291 words)

	Structures of the Mating-Type Loci of Cordyceps takaomontana -- Yokoyama et al. 69 (8): 5019 -- Applied and ...
		Efficient cloning of ascomycete mating type genes by PCR amplification of the conserved MAT HMG box.
		Mating types and sexual development in filamentous ascomycetes.
		Proposed nomenclature for mating type genes of filamentous ascomycetes.
	aem.asm.org /cgi/content/full/69/8/5019 (1607 words)

	Yeast Mating Type
		The HML and HMR genes are maintained in a silent state by trans acting factors (products of the SIR genes) and a cis acting element, E. The E elements function in either orientation and at varying distances from their target genes.
		This type of regulation of gene expression is sometimes termed casette regulation in analogy to the insertion of a tape casette in a tape player.
		The mating type gene rearrangement is but one example of programmed rearrangement.
	opbs.okstate.edu /~melcher/MG/MGW3/MG3241.html (372 words)

	Geographic Distribution of Mating Type Alleles of Cryptococcus neoformans in Four Areas of the United States -- Yan et ...
		Geographic Distribution of Mating Type Alleles of Cryptococcus neoformans in Four Areas of the United States -- Yan et al.
		Strains JEC21 (lane 4), JEC20 (lane 5), H99 (lane 6), and MAS92-0153 (lane 7) were used as controls, and their serotypes and mating types were described in the text and the legend of Fig.
		Distribution of mating type alleles as determined by PCR with serotype- and mating type allele-specific primers in C.
	jcm.asm.org /cgi/content/full/40/3/965 (4794 words)

	Mating type-dependent constraints on the mobility of the left arm of yeast chromosome III -- Bressan et al. 164 (3): ...
		Mating type-dependent constraints on the mobility of the left arm of yeast chromosome III -- Bressan et al.
		Mating type–dependent associations of the left arms of chromosome III in diploid cells are dependent on the RE
		Mating type control in Saccharomyces cerevisiae: a frameshift mutation at the common DNA sequence, X, of the HML alpha locus.
	www.jcb.org /cgi/content/full/164/3/361 (6375 words)

	Mating-Type-Specific and Nonspecific PAK Kinases Play Shared and Divergent Roles in Cryptococcus neoformans -- Wang et ...
		locus, the PAK1 gene is unlinked to the mating type.
		subunit complex during responses to pheromone and mating (28).
		Identification of the MATa mating type locus of Cryptococcus neoformans reveals a serotype A MATa strain thought to have been extinct.
	ec.asm.org /cgi/content/full/1/2/257 (6794 words)

	Mcm1 regulates donor preference controlled by the recombination enhancer in Saccharomyces mating-type switching -- Wu ...
		Alpha2p controls donor preference during mating type interconversion in yeast by inactivating a recombinational enhancer of chromosome III.
		Mating type control in Saccharomyces cerevisiae: A frameshift mutation at the common DNA sequence, X, of the HML
		Cell type-specific chromatin organization of the region that governs directionality of yeast mating type switching.
	www.genesdev.org /cgi/content/full/12/11/1726 (6118 words)

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