Physicochemical Properties of Peptide



PPepDB ID:PPepDB_672
Number of amino acids:25
Molecular Weight:2535.85 Da
Theoretical pI:5.96


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)624%
Glutamic Acid GLU (E)14%
Aspartic Acid ASP (D)00%
Glycine GLY (G)416%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)28%
Glutamine GLN (Q)00%
Proline PRO (P)28%
Serine SER (S)28%
Arginine ARG (R)14%
Threonine THR (T)416%
Tryptophan TRP (W)14%
Valine VAL (V)28%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC98
HydrogenH155
NitrogenN31
OxygenO36
SulphurS6

FormulaC98H155N31O36S6
Total Number of Atoms:326


Total number of positively charged residues (ARG + LYS):1
Total number of negatively charged residues (ASP + GLU):1
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5875
Absorption 0.1% (=1 g/l)    2.317,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    2.169,   assuming all CYS residues are reduced
Aromaticity:0.040

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.04

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[12.00, 40.00, 4.00]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:23.2
Grand average of hydropathicity (GRAVY):-0.07