Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1530
Number of amino acids:49
Molecular Weight:5372.01 Da
Theoretical pI:7.71


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)36.12%
Cysteine CYS (C)816.33%
Glutamic Acid GLU (E)24.08%
Aspartic Acid ASP (D)12.04%
Glycine GLY (G)510.2%
Phynylalanine PHE (F)12.04%
Isoleucine ILE (I)12.04%
Histidine HIS (H)24.08%
Lysine LYS (K)24.08%
Methionine MET (M)00%
Leucine LEU (L)12.04%
Asparagine ASN (N)24.08%
Glutamine GLN (Q)24.08%
Proline PRO (P)24.08%
Serine SER (S)612.24%
Arginine ARG (R)24.08%
Threonine THR (T)24.08%
Tryptophan TRP (W)12.04%
Valine VAL (V)24.08%
Tyrosine TYR (Y)48.16%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC225
HydrogenH334
NitrogenN66
OxygenO72
SulphurS8

FormulaC225H334N66O72S8
Total Number of Atoms:705


Total number of positively charged residues (ARG + LYS):4
Total number of negatively charged residues (ASP + GLU):3
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11960
Absorption 0.1% (=1 g/l)    2.226,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11460
Absorption 0.1% (=1 g/l)    2.133,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.01

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[20.41, 30.61, 12.24]

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:33.8776
Grand average of hydropathicity (GRAVY):-0.41