Gene: exoamylase-1 I
exoamylase-1
locus: exo-1
locus_name: exoamylase-1
organism_type: B
chromosome_number: I
chromosome_side:
link_group: I
cultural_requirements: I. Linked to mt (7%) and ad-3A (22%). Stated left of mt, but data not given (325).Hyperproduction of beta-amylase, alpha-amylase, glycoamylase, invertase (beta-fructofuranosidase), and (to a lesser extent) trehalase (404, 405, 1027). Enzymes secreted abundantly on depletion of exogenous carbon source (404). A polysaccharide is also released (325). Sevenfold increase in conidial enzyme levels. Altered amino sugar content of cell wall (404, 405). Initial allele called SF26, exoa-1 (325, 404). Probable second allele found in a strain of inl (89601) a (194, 325, 1027); allelism evidence in reference 325. With SF26, high amylase and high invertase levels cosegregated in 91 isolates (405). With allele from the 89601 strain, in a mixed-background cross, high amylase and high invertase each act as if due to a single major gene with many modifiers; high amylase and high invertase usually cosegregate and are not correlated with alkaline phosphatase levels (1027). The relation of exo-1 to gene VI-178, which reverses repression of invertase and trehalase production by mannose, is not known (663). For a linked gene defective in glycoamylase, see sor(T9) (called gla in reference 50 and called amy in reference 325). exo-1 has not been tested for allelism with sor(T9), but has been stated to be on the opposite side of mt. Because inl(89601) a has been used to obtain mutants by inositol-less death enrichment, exo-1 may be present but unrecognized in many laboratory stocks.
enzyme_id:
anid_name:
near_l: Linked to mt (7%) and ad-3A (22%)
near_r:
neu_name:
supplement:
image_url:
Strains
| FGSC # | Reporting Genes | Species |
|---|---|---|
| FGSC #2256 | exo-1 | Neurospora crassa |
References
