Esculentin-2CHa
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Esculentin-2CHa (from Latin ēsculentus (“edible; nutritious; full of food”)) is an antimicrobial peptide located outside the epithelial cell's membrane of the skin of many species of amphibians, such as Rana chiricahuensis. This peptide has recently become more important due to its defense response function and its possible application in the treatment of various human pathologies, that range from type 2 diabetes to bacterial and fungi infections. Esculentin-2CHa is a peptide that belongs to the Esculentin-2 family, which is known for its broad-spectrum of antimicrobial activity and its low cytotoxicity to human erythrocytes. However, not much is known about its structures and their relation to the functions these peptides carry out.
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Name | Esculentin-2CHa |
---|---|
Length | 37 |
Mass | 3841.1044 |
Isoelectric point (pI) | 10.44 |
Net charge | +5 |
Hydrophobicity | +30.36 Kcal * mol−1 |
Extinction coefficient 1(*) | 125 M−1 * cm−1 |
Extinction coefficient 2 (*) | 0 M−1 * cm−1 |
Sequence | GFSSIFRGVAKFASKGLGKDLAKLGVDLVACKISKQC |
(*) The molar extinction is calculated by the number of tyrosines (Y), and the number of disulfide bonding pairs (cystines). Then the following formula is used to calculate the first extinction coefficient: W*5500 + Y*1490 + cystines*125. This calculation assumes that all cysteines pair into cystines. The second version assumes that all cysteines are reduced and there are no cystines, thus it is calculated as W*5500 + Y*1490.[1]