Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4343
Number of amino acids:386
Molecular Weight:42648.37 Da
Theoretical pI:5.31


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3910.1%
Cysteine CYS (C)20.52%
Glutamic Acid GLU (E)246.22%
Aspartic Acid ASP (D)215.44%
Glycine GLY (G)215.44%
Phynylalanine PHE (F)205.18%
Isoleucine ILE (I)194.92%
Histidine HIS (H)61.55%
Lysine LYS (K)256.48%
Methionine MET (M)102.59%
Leucine LEU (L)3910.1%
Asparagine ASN (N)205.18%
Glutamine GLN (Q)143.63%
Proline PRO (P)153.89%
Serine SER (S)287.25%
Arginine ARG (R)112.85%
Threonine THR (T)348.81%
Tryptophan TRP (W)20.52%
Valine VAL (V)205.18%
Tyrosine TYR (Y)164.15%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1910
HydrogenH2984
NitrogenN492
OxygenO589
SulphurS12

FormulaC1910H2984N492O589S12
Total Number of Atoms:5987


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):45
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    34965
Absorption 0.1% (=1 g/l)    0.820,   assuming all pairs of CYS residues form cystines

Ext. coefficient    34840
Absorption 0.1% (=1 g/l)    0.817,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.62

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.05, 21.76, 29.02]

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:83.7304
Grand average of hydropathicity (GRAVY):-0.20