Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5802
Number of amino acids:148
Molecular Weight:16292.75 Da
Theoretical pI:7.89


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)74.73%
Cysteine CYS (C)1610.81%
Glutamic Acid GLU (E)85.41%
Aspartic Acid ASP (D)53.38%
Glycine GLY (G)1610.81%
Phynylalanine PHE (F)85.41%
Isoleucine ILE (I)74.73%
Histidine HIS (H)10.68%
Lysine LYS (K)106.76%
Methionine MET (M)42.7%
Leucine LEU (L)74.73%
Asparagine ASN (N)106.76%
Glutamine GLN (Q)10.68%
Proline PRO (P)106.76%
Serine SER (S)96.08%
Arginine ARG (R)53.38%
Threonine THR (T)64.05%
Tryptophan TRP (W)00%
Valine VAL (V)74.73%
Tyrosine TYR (Y)117.43%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC713
HydrogenH1082
NitrogenN186
OxygenO212
SulphurS20

FormulaC713H1082N186O212S20
Total Number of Atoms:2213


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):13
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    17390
Absorption 0.1% (=1 g/l)    1.067,   assuming all pairs of CYS residues form cystines

Ext. coefficient    16390
Absorption 0.1% (=1 g/l)    1.006,   assuming all CYS residues are reduced
Aromaticity:0.128

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 50.47

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.03, 30.41, 17.57]

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:55.3378
Grand average of hydropathicity (GRAVY):-0.18