Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4646
Number of amino acids:430
Molecular Weight:49150.32 Da
Theoretical pI:6.6


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)143.26%
Cysteine CYS (C)71.63%
Glutamic Acid GLU (E)235.35%
Aspartic Acid ASP (D)194.42%
Glycine GLY (G)317.21%
Phynylalanine PHE (F)194.42%
Isoleucine ILE (I)358.14%
Histidine HIS (H)102.33%
Lysine LYS (K)317.21%
Methionine MET (M)112.56%
Leucine LEU (L)429.77%
Asparagine ASN (N)235.35%
Glutamine GLN (Q)163.72%
Proline PRO (P)214.88%
Serine SER (S)399.07%
Arginine ARG (R)92.09%
Threonine THR (T)214.88%
Tryptophan TRP (W)92.09%
Valine VAL (V)204.65%
Tyrosine TYR (Y)306.98%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2251
HydrogenH3418
NitrogenN556
OxygenO644
SulphurS18

FormulaC2251H3418N556O644S18
Total Number of Atoms:6887


Total number of positively charged residues (ARG + LYS):40
Total number of negatively charged residues (ASP + GLU):42
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    94575
Absorption 0.1% (=1 g/l)    1.924,   assuming all pairs of CYS residues form cystines

Ext. coefficient    94200
Absorption 0.1% (=1 g/l)    1.917,   assuming all CYS residues are reduced
Aromaticity:0.135

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.30

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[36.05, 26.51, 20.93]

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:86.5814
Grand average of hydropathicity (GRAVY):-0.23