?
Organ specific protein This eukaryotic family includes a number of plant organ-specific proteins. The predicted amino acid sequence suggests that these proteins could be exported and glycosylated. Family members consist of an N-terminal region with no repeats and a C-terminal region which carries multiple tandem repeats. The N-terminal region ends before the repeats region and is defined as the area that extends from the end of the signal peptide to the start of the tandem repeat region. Its length varies considerably, ranging from 30 to 80 amino acids. Generally, these proteins vary in size where it is suggested that thirty-six percent of the sequences had fewer than 150 amino acids; 41% ranged from 150 to 250, and 23% had more than 250 amino acids. Accordingly, these proteins belong to category II of proteins having repeats in tandem; that is, those with the repeats ranging in length from 20 to 40 residues. The second region (C-terminal) in the mature protein is the tandem repeat oligopeptide area. The repeats start with a common hexapeptide (E/D)FEPRP and end with X4Y i.e. (D/E)FEPRPX4Y. Full-length sequences revealed considerable variability in the number of repeats, ranging from 2 to 17. The length of the repeats also varied, ranging from 12 amino acids to 34 amino acids. |
Jiyao W et al.(2023). "The conserved domain database in 2023.",