Avtor/Urednik		Barlič, Ariana
Naslov		Molekulsko kloniranje in cDNA sekvenca inhibitorjev cisteinskih proteinaz iz konjske morske vetrnice (Actinia equina L.): diplomsko delo
Prevedeni naslov		Molecular cloning and cDNA sequence of cysteine proteinase inhibitors from sea anemone (Actinia equina L.): graduation thesis
Tip		monografija
Kraj izdaje		Ljubljana
Založnik		Biotehniška fakulteta, Oddelek za biologijo
Leto izdaje		1995
Obseg		str. 55
Jezik		slo, eng
Abstrakt		Several inhibitors of cysteine proteinases from sea anemone (Actinia equina L.) have been isolated. However their amounts were insuficient for further investigations. So far only their N-terminal sequence have been determined, as well as three tryptic fragments. In order to determine their entire primary structure, we have isolated positive clones from a lambda gt11 cDNA library made from the sea anemone mRNA, by immunoscreening. The positive cDNA clone was purified and amplified and the labmda DNA was isolated. The phage DNA was further cut using BamHI restriction endonuclease, and the following agarose gel electrophoresis displayed a band that corresponded to the positive cDNA of approximately 900 bp. The latter was then ligated into the pUC 19 plasmids opened at the BamHI site, and the resulting recombinant plasmid DNA was used to transform competent Escherichia coli. DHSa cells. After isolation of the plasmid DNA we analysed the size of the inserted fragment which, again, tumed out to be 900 bp long. Using the Sanger's method of sequencing, the nucleotide sequence was determined. EI1 clone of 888 bp codes for a protein of 231 amino acid residues. Computer analysis of the amino acid sequence (EI) helped us to predict its secondary structure, as well as to calculate its hydropathic index. According to the mostly hydrophobic character of the first 32 residue region located before the N-terminus of mature protein implies that this region corresponds to the signal peptide. We compared the N- and C-termini of the deduced mature protein form and found that both ends are highly similar in amino acid sequence, which led us to the assumption that, through the course of evolution, the gene encoding the ancestor of the EI, has probably been duplicated. ( Abstract truncatrd. at 2000 character)
Deskriptorji		SEA ANEMONES CNIDARIAN VENOMS CYSTEINE PROTEINASE INHIBITORS CLONING, MOLECULAR DNA, COMPLEMENTARY ESCHERICHIA COLI PLASMIDS BACTERIOPHAGE LAMBDA TRANSFORMATION, GENETIC DNA, RECOMBINANT SEQUENCE ANALYSIS, DNA BASE SEQUENCE BLOTTING, WESTERN