FGSC #335

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Reporting Genes: leu-2 pan-1 rug

Species: crassa

Allele: 37501 5531 B57

Alternate Strain Number: 4028

Depositor: DDP

Linkage Group: IVR IVR IVR

Mating Type: a

Species Number: 10

Deposit Sheet ↗

Genes

Locus	Cultural Requirements	Link Group	Type
leu-2	IVR. Between trp-4 (2%) and ilv-3 (4%) (579, 991). (D.C. Regnery, cited in reference 633)Requires leucine (867, 868). Structural gene for isopropylmalate isomerase (432, 871) (Fig. 15). Altered heat inactivation of hybrid enzymes (432). Structural differences of hybrid enzymes (871). Accumulates alpha-isopropylmalate (427). Synthesis of the enzyme also requires the function of regulatory gene leu-3+ and the presence of alpha-isopropylmalate, which acts as an inducer (427). Resistant to aminotriazole (D.D. Perkins, unpublished data). Alleles show intralocus complementation (424). Allele 37501 is heat sensitive (30°C versus 20 C) and is leaky at 25°C (D.C. Regnery, personal communication).	IVR	B
rug	IVR. Right of pyr-2 (3%). Left of the T(NMI52) right breakpoint and cys-4 (10%) (633, 721,812).Spreading colonial morphology, with conidiating tufts. Grows better on sucrose minimal medium than on glycerol complete medium (789).	IVR	B
pan-1	IVR. Between ad-6 (1 to 2%) and cot-1 (2 to 3%) (633, 692, PB). (482). cel, col-1, int, pho-3, and thi-5 all appear to be closely linked in this crowded region. Requires intact pantothenic acid for growth under standard conditions. Able to synthesize both precursors, beta-alanine and pantoyl lactone (1058). Ability to synthesize pantothenic acid from beta-alanine plus pantoyl lactone is demonstrable in vitro but not in vivo unless cultures are aerated (1111, 1113, 1114). Unlike pan-2, pan-1 has no effect on ascospore ripening in heterozygous crosses. Called group A. For alleles see reference 138.	IVR	B