Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4896
Number of amino acids:131
Molecular Weight:14382.37 Da
Theoretical pI:8.9


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1612.21%
Cysteine CYS (C)10.76%
Glutamic Acid GLU (E)53.82%
Aspartic Acid ASP (D)75.34%
Glycine GLY (G)75.34%
Phynylalanine PHE (F)53.82%
Isoleucine ILE (I)75.34%
Histidine HIS (H)32.29%
Lysine LYS (K)43.05%
Methionine MET (M)21.53%
Leucine LEU (L)139.92%
Asparagine ASN (N)75.34%
Glutamine GLN (Q)86.11%
Proline PRO (P)64.58%
Serine SER (S)107.63%
Arginine ARG (R)107.63%
Threonine THR (T)53.82%
Tryptophan TRP (W)00%
Valine VAL (V)118.4%
Tyrosine TYR (Y)43.05%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC634
HydrogenH1018
NitrogenN186
OxygenO190
SulphurS3

FormulaC634H1018N186O190S3
Total Number of Atoms:2031


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):12
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.414,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.414,   assuming all CYS residues are reduced
Aromaticity:0.069

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.27

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.53, 22.90, 27.48]

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:96.1068
Grand average of hydropathicity (GRAVY):-0.13