Disulphide Bonding in a Stylar Self-Incompatibility Ribonuclease of Nicotiana Alata
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چکیده
منابع مشابه
Expression of a Self-Incompatibility Glycoprotein (S2-Ribonuclease) from Nicotiana alata in Transgenic Nicotiana tabacum.
In Nicotiana alata, self-incompatibility is controlled by a single locus, designated the S-locus, with multiple alleles. Stylar products of these alleles are ribonucleases that are secreted mainly in the transmitting tract tissues. N. tabacum plants were transformed with constructs containing the S2-cDNA and genomic S2-sequences from N. alata that were linked to the cauliflower mosaic virus 35S...
متن کاملIdentification, isolation, and N-terminal sequencing of style glycoproteins associated with self-incompatibility in Nicotiana alata.
S-Gene-associated glycoproteins (S-glycoproteins) from styles of Nicotiana alata, identified by non-equilibrium two-dimensional electrophoresis, were purified by cation exchange fast protein liquid chromatography with yields of 0.5 to 8 micrograms of protein per style, depending on the S-genotype of the plant. The method relies on the highly basic nature of the S-glycoproteins. The elution prof...
متن کاملSequence variability of three alleles of the self-incompatibility gene of Nicotiana alata.
Three alleles of the self-incompatibility gene of Nicotiana alata have been cloned and sequenced. A comparison of the sequences shows a surprisingly low level of homology (56%) and the presence of defined regions of homology and variability. The homologous regions include the N-terminal sequence, most of the cysteine residues and glycosylation sites, as well as other blocks throughout the seque...
متن کاملIdentification of stylar RNases associated with gametophytic self-incompatibility in almond (Prunus dulcis).
Stylar proteins of 13 almond (Prunus dulcis) cultivars with known S-genotypes were surveyed by IEF and 2D-PAGE combined with immunoblot and N-terminal amino acid sequence analyses to identify S-RNases associated with gametophytic self-incompatibility (SI) in this plant species. RNase activities corresponding to Sa and Sb, two of the four S-alleles tested, were identified by IEF and RNase activi...
متن کاملStylar peroxidase and incompatibility reactions in Petunia hybrida.
Self-, cross- and non-pollinated styles of Petunia hybrida were treated with 3-3'-diaminobenzidine for the ultrastructural localization of peroxidase activity. Wall peroxidases were absent in cross-pollinated styles, but they were detectable as an osmiophilic deposit on the cell walls of the outer portion of the transmitting tissue in self- and non-pollinated styles. The cell layer showing pero...
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ژورنال
عنوان ژورنال: European Journal of Biochemistry
سال: 1996
ISSN: 0014-2956,1432-1033
DOI: 10.1111/j.1432-1033.1996.0075r.x