Physicochemical Properties of Peptide



PPepDB ID:PPepDB_749
Number of amino acids:112
Molecular Weight:11862.62 Da
Theoretical pI:7.6


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1412.5%
Cysteine CYS (C)119.82%
Glutamic Acid GLU (E)54.46%
Aspartic Acid ASP (D)65.36%
Glycine GLY (G)65.36%
Phynylalanine PHE (F)21.79%
Isoleucine ILE (I)21.79%
Histidine HIS (H)10.89%
Lysine LYS (K)87.14%
Methionine MET (M)10.89%
Leucine LEU (L)54.46%
Asparagine ASN (N)54.46%
Glutamine GLN (Q)32.68%
Proline PRO (P)76.25%
Serine SER (S)65.36%
Arginine ARG (R)43.57%
Threonine THR (T)98.04%
Tryptophan TRP (W)10.89%
Valine VAL (V)1311.61%
Tyrosine TYR (Y)32.68%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC506
HydrogenH815
NitrogenN143
OxygenO161
SulphurS12

FormulaC506H815N143O161S12
Total Number of Atoms:1637


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    10595
Absorption 0.1% (=1 g/l)    0.893,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    0.840,   assuming all CYS residues are reduced
Aromaticity:0.054

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.48

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.21, 21.43, 22.32]

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:70.5356
Grand average of hydropathicity (GRAVY):-0.05