Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5427
Number of amino acids:363
Molecular Weight:39759.18 Da
Theoretical pI:6.35


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)277.44%
Cysteine CYS (C)20.55%
Glutamic Acid GLU (E)164.41%
Aspartic Acid ASP (D)154.13%
Glycine GLY (G)318.54%
Phynylalanine PHE (F)143.86%
Isoleucine ILE (I)246.61%
Histidine HIS (H)61.65%
Lysine LYS (K)143.86%
Methionine MET (M)92.48%
Leucine LEU (L)308.26%
Asparagine ASN (N)277.44%
Glutamine GLN (Q)133.58%
Proline PRO (P)215.79%
Serine SER (S)318.54%
Arginine ARG (R)154.13%
Threonine THR (T)174.68%
Tryptophan TRP (W)61.65%
Valine VAL (V)308.26%
Tyrosine TYR (Y)154.13%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1784
HydrogenH2770
NitrogenN480
OxygenO529
SulphurS11

FormulaC1784H2770N480O529S11
Total Number of Atoms:5574


Total number of positively charged residues (ARG + LYS):29
Total number of negatively charged residues (ASP + GLU):31
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    55475
Absorption 0.1% (=1 g/l)    1.395,   assuming all pairs of CYS residues form cystines

Ext. coefficient    55350
Absorption 0.1% (=1 g/l)    1.392,   assuming all CYS residues are reduced
Aromaticity:0.096

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.56

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.78, 30.30, 22.59]

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:89.4215
Grand average of hydropathicity (GRAVY):-0.11