FGSC #3762

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Reporting Genes: met(26U);inl; see comments

Species: crassa

Allele: 26U(t);89601

Alternate Strain Number: 26U

Mutagen: UV

Depositor: DRS

Linkage Group: IVR;VR

Mating Type: a

Species Number: 10

Genetic Background: M

ref1: Stadler 1981 NN 28:18, https://doi.org/10.4148/1941-4765.1660

Deposit Sheet ↗

Genes

Locus	Cultural Requirements	Link Group	Type
inl	VR. Between pho-3 (3 to 4%) and pab-1 (1 to 10%). Right of al-3 (362, 397, 1036). (482)Requires inositol (65). Lacks D-myoinositol-1-phosphatase (1142). Lack of glucocycloaldolase found by Pina and Tatum (826) is attributed by Williams (1142) to drastic repression of glucocycloaldolase by the concentration of inositol used for growth. Growth is colonial on low levels of inositol (367). Tends to extrude dark pigment into the medium when grown on suboptimal inositol. Composition of phospholipids and cell walls is abnormal on limiting inositol (367, 439, 440, 501). Inhibited by hexachlorocyclohexane (366, 457, 931). Conidia are subject to death by unbalanced growth on minimal medium (1028, 1033), a property exploited for mutant enrichment ("inositol-less death") (606, 647) because double mutants are at a selective advantage. Heat-sensitive allele 83201 is especially useful for mutant enrichment (832, 1043). Used in the first experiments reporting transformation of Neurospora by N. crassaDNA (677, 679) and reported to be efficient as a recipient in absence of inositol (1162). Used to study glucose (917) and sulfate (641) transport systems. Used extensively for studying induced reversion (392). Used for studying the mechanism of inositol-less death (647, 702), mutagenicity of ferrous ions, and regulation of mitochondrial membrane fluidity; for a review, see reference 702. Spontaneous reversion rates (386). Allele-specific partial suppressor (390). Allele 46802 is nonrevertable and inseparable from translocation 46802 (386, 808). Strains carrying heat-sensitive allele 83201 show slow semicolonial growth in liquid minimal medium at 25°C (641), but look normal on slants (D.D. Perkins, unpublished data). Strains carrying allele 89601 contain cross-reacting material (1183). Mutant gene exo-1 is present in the inl(89601) a stock FGSC 498 and may, therefore, be present in stocks of mutants derived by inositol-less death. (See references 194, 325, and 1027). Called inos.	VR	B
met(26U)	Auxotrophs designated met require methionine, and some can use its immediate precursors, homocysteine and cystathionine; they cannot use cysteine. (Mutants able to use cysteine as well as methionine are designated cys.) For the methionine biosynthetic pathway, see Fig. 17. For a review, see reference 351. For regulation, see individual loci and reference 965. Formerly called me. Biosynthetic pathways of homoserine, threonine, and methionine, showing sites of gene action (124, 208, 209, 351, 352, 518, 547, 965). For conversion of threonine to isoleucine, see Fig. 15. H4PteGlu, Tetrahydrofolate. It is not clear whether the polyglutamylation step controlled by met-6 occurs only at the stage shown.		B