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A new distinct group of 2 S albumins from rapeseed
Author(s) -
Monsalve Rafael I.,
Lopez-Otin Carlos,
Villalba Mayte,
Rodríguez Rosalía
Publication year - 1991
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(91)81419-9
Subject(s) - rapeseed , brassica , similarity (geometry) , structural similarity , biology , disulfide bond , sequence (biology) , genetic similarity , biochemistry , genetics , computational biology , botany , genetic diversity , population , demography , sociology , artificial intelligence , computer science , image (mathematics)
Two napins (nIa and nIb), isolated from Brassica napus (rapeseed) seeds, have been sequenced. The two proteins show the common structural pattern of the 2 S albumins, since they are composed of two disulfide‐linked chains of different size, yet they exhibit an atypical low molecular weight (12.5 kDa vs. 14.5 kDa of the major napins). High sequence similarity has been found between these 2 proteins, but only 54% similarity can be estimated from their comparison with the 14.5 kDa major napins. Thus, nIa and nIb are considered representatives of a new distinct group of rapeseed napins since all the previously known napins exhibit 95% sequence similarity. Unexpectedly, the similarity increases when compared with the 2 S proteins from other species.