FGSC #4198

Mutant Type

Genus: N

reporting_genes: This strain is not available uvs-6;mtr met-2 pan-1

species: Neurospora crassa

allele: ALS35;15(r) P159 5531

stock: M1904 A

glasgow:

mutagen:

Depositor: EK

Link Group: IR;IVR IVR IVR

MT: A

Species No: 10

gene_back:

oppmt: 0

trans:

ref1: Kafer 1982. Neurospora Newsl. 29:41-44, https://doi.org/10.4148/1941-4765.1645

ref2:

site:

country:

ksudc_link: https://digital.lib.k-state.edu/item/neurospora-crassa/fgsc-4198

ksudc_link_html: https://digital.lib.k-state.edu/item/neurospora-crassa/fgsc-4198 ↗

Genes

Locus	Cultural Requirements	Link Group	Type
mtr	IVR. Between pdx-1 (2%) and col-4 (1%) (101, 1017).Resistant to 4-methyltryptophan and p-fluorophenylalanine. pmn (= Pm-N, pm n), selected by resistance to p-fluorophenylalanine, has been shown to be alletic with mtr(R. Sadler and S. Ogilvie-Villa, personal communication; see also reference 248). Defective in transport of neutral aliphatic and aromatic amino acids via amino acid transport system I (as defined in reference 777) (248, 602, 1017, 1152). Causes an alteration in surface glycoproteins (1038). Used extensively for transport studies (247a, 1150 [review], 1152), also for studies of the mechanism of intralocus recombination (1021). Resistance is recessive in duplications from T(S1229) (PB). Recessive resistance used in a heterokaryon test system for mutation studies (1020). Suppressors obtained and used for selecting other resistance mutants (106, 107, 555, 1018). Allele 26 is a putative frameshift mutation reverted by ICR170 (106, 107). mtrascospores are slow to darken and mature; up to 50% of the young ascospores from heterozygous crosses are white (152, PB). With probable allele MN18, ascospore viability is improved by the addition of peptone to the crossing medium when the male parent is added (152). mtr has been scored on media containing 10 or 70 µg of filter-sterilized 4-methyltryptophan per ml or on 20 or 60 µg of p-fluorophenylalanine per ml (550, 1021, PB). Unlike 4-methyltryptophan, p-fluorophenylalanine is heat stable and can be added before autoclaving. Strains with mutations at the mtr locus may be obtained by selection for resistance to numerous agents or for defects in uptake ability. Thus, there is confusion in nomenclature. Genes originally designated neua, neur, neut, tru(628) may be mtr alleles. mtr was initially called mt (602).	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
uvs-6	IR. Between thi-1 (3 to 8%) and ad-9 (4%) (538; E. Kafer, personal communication; D. Newmeyer, unpublished data). Very close to met-6 (< 1%) (D. Newmeyer, unpublished data). (937). Increases sensitivity to UV (273, 937), ionizing radiation (537, 937, 940), nitrosoguanidine (509, 537), histidine (755), methyl methane sulfonate (536), ICR-170 and 4-nitroquinoline 1-oxide (509), and possibly mitomycin C (537). Normal UV-induced mutation (273). For mutation induction by other agents, see references 509 and 940. Increased spontaneous mutation not evident in the ad-3 system (275), but is found for recessive lethals in a heterokaryon test system (E. Kafer, personal communication). Normal dimer excision (1164). Defective in extracellular nuclease, giving reduced halos around colonies on DNA agar (538). Increased duplication instability due to mitotic recombination, deletion, or both (759). Homozygous barren (759), with a block at crozier differentiation (860). Reduced conidial viability (537). Switches to stop-start growth after initial normal growth (D. Newmeyer, unpublished data). Not completely recessive in heterokaryotic conidia (979). Increased stability of CPS (Pyr) activity in vitro suggests that protease activity may be reduced in the mutant uvs-6 (882); see also reference 360. Double mutant uvs-3;uvs-6 is inviable (506).	IR	B
met-2	IVR. Between trp-4 (6%) and pan-1 (4%) (719). Linked to ilv-3(0/129) (354, 579). Uses methionine or homocysteine; accumulates cystathionine (469). Lacks cystathionase II (353) (Fig. 17). Fine-structure map (720, 724). Complementation map (719). Used in major studies of intralocus recombination and its polarity (720, 724).	IVR	B