Molecular characterization of the Linusitin-like gene family from flax

被引:1
作者
Anzlovar, S
Gruden, K
Rogelj, B
Strukelj, B
Dermastia, M
机构
[1] Univ Ljubljana, Biotech Fac, Dept Biol, SI-1000 Ljubljana, Slovenia
[2] Jozef Stefan Inst, Dept Biochem & Mol Biol, SI-1000 Ljubljana, Slovenia
[3] Univ Ljubljana, Fac Pharm, SI-1000 Ljubljana, Slovenia
[4] Natl Inst Biol, SI-1000 Ljubljana, Slovenia
关键词
osmotins; PR-5; proteins; linusitin; flax; gene expression;
D O I
10.1086/499612
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Osmotin-like proteins from the fifth class of pathogenesis-related proteins (PR-5), including linusitin that we isolated from flax seeds, have been characterized in many plant species. A cDNA library has been constructed from flax (Linum usitatissimum L.) seedlings to analyze the osmotin-like gene family from flax. A cDNA LIN1 was isolated from the library and found to exhibit significant similarities to genes encoding osmotin-like proteins and thaumatin from Thaumatococcus daniellii. The deduced LIN1 protein contains all 16 cysteine residues that are conserved in all PR-5 proteins as well as other residues important for antifungal activity. The LIN1 cDNA encodes a preprotein, which is subsequently processed into the mature protein by removal of an N-terminal signal peptide. Southern blot analysis showed that the LIN1 gene family is encoded by few copies in the flax genome. The gene encoding LIN1 is intronless and developmentally regulated, and transcripts accumulate in an organ-specific manner in healthy flax seedlings. The LIN1 mRNA was constitutively expressed, predominantly in root tissue. The comparison of N-terminus sequences from linusitin-like protein (LIN1) and previously isolated linusitin confirmed differences in amino acid composition and demonstrated the occurrence of at least two osmotin-like proteins in flax.
引用
收藏
页码:231 / 238
页数:8
相关论文
共 33 条
[1]   Gapped BLAST and PSI-BLAST: a new generation of protein database search programs [J].
Altschul, SF ;
Madden, TL ;
Schaffer, AA ;
Zhang, JH ;
Zhang, Z ;
Miller, W ;
Lipman, DJ .
NUCLEIC ACIDS RESEARCH, 1997, 25 (17) :3389-3402
[2]   The comparative analysis of osmotins and osmotin-like PR-5 proteins [J].
Anzlovar, S ;
Dermastia, M .
PLANT BIOLOGY, 2003, 5 (02) :116-124
[3]   Membrane permeabilizing activity of pathogenesis-related protein linusitin from flax seed [J].
Anzlovar, S ;
Dalla Serra, M ;
Dermastia, M ;
Menestrina, G .
MOLECULAR PLANT-MICROBE INTERACTIONS, 1998, 11 (07) :610-617
[4]   The crystal structure of the antifungal protein zeamatin, a member of the thaumatin-like, PR-5 protein family [J].
Batalia, MA ;
Monzingo, AF ;
Ernst, S ;
Roberts, W ;
Robertus, JD .
NATURE STRUCTURAL BIOLOGY, 1996, 3 (01) :19-23
[5]   THE FOCUSING POSITIONS OF POLYPEPTIDES IN IMMOBILIZED PH GRADIENTS CAN BE PREDICTED FROM THEIR AMINO-ACID-SEQUENCES [J].
BJELLQVIST, B ;
HUGHES, GJ ;
PASQUALI, C ;
PAQUET, N ;
RAVIER, F ;
SANCHEZ, JC ;
FRUTIGER, S ;
HOCHSTRASSER, D .
ELECTROPHORESIS, 1993, 14 (10) :1023-1031
[6]   ISOLATION AND CHARACTERIZATION OF A 25 KDA ANTIFUNGAL PROTEIN FROM FLAX SEEDS [J].
BORGMEYER, JR ;
SMITH, CE ;
HUYNH, QK .
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS, 1992, 187 (01) :480-487
[7]   Putative pathogenesis-related genes within Solanum nigrum L. var. americanum genome:: isolation of two genes coding for PR5-like proteins, phylogenetic and sequence analysis [J].
Campos, MA ;
Ribeiro, SG ;
Rigden, DJ ;
Monte, DC ;
De Sa, MFG .
PHYSIOLOGICAL AND MOLECULAR PLANT PATHOLOGY, 2002, 61 (04) :205-216
[8]   Isolation and characterization of a cDNA clone encoding an osmotin-like protein from Arabidopsis thaliana [J].
Capelli, N ;
Diogon, T ;
Greppin, H ;
Simon, P .
GENE, 1997, 191 (01) :51-56
[9]  
Cheong NE, 1997, PHYSIOL PLANTARUM, V101, P583, DOI 10.1111/j.1399-3054.1997.tb01041.x
[10]  
CHOMCZYNSKI P, 1987, ANAL BIOCHEM, V162, P156, DOI 10.1016/0003-2697(87)90021-2