Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4180
Number of amino acids:913
Molecular Weight:102117.09 Da
Theoretical pI:6.61


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)586.35%
Cysteine CYS (C)60.66%
Glutamic Acid GLU (E)353.83%
Aspartic Acid ASP (D)495.37%
Glycine GLY (G)687.45%
Phynylalanine PHE (F)465.04%
Isoleucine ILE (I)556.02%
Histidine HIS (H)252.74%
Lysine LYS (K)303.29%
Methionine MET (M)242.63%
Leucine LEU (L)808.76%
Asparagine ASN (N)454.93%
Glutamine GLN (Q)313.4%
Proline PRO (P)657.12%
Serine SER (S)697.56%
Arginine ARG (R)495.37%
Threonine THR (T)657.12%
Tryptophan TRP (W)151.64%
Valine VAL (V)566.13%
Tyrosine TYR (Y)424.6%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC4617
HydrogenH7059
NitrogenN1231
OxygenO1334
SulphurS30

FormulaC4617H7059N1231O1334S30
Total Number of Atoms:14271


Total number of positively charged residues (ARG + LYS):79
Total number of negatively charged residues (ASP + GLU):84
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    145455
Absorption 0.1% (=1 g/l)    1.424,   assuming all pairs of CYS residues form cystines

Ext. coefficient    145080
Absorption 0.1% (=1 g/l)    1.421,   assuming all CYS residues are reduced
Aromaticity:0.113

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.45

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.20, 27.05, 21.58]

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:81.8072
Grand average of hydropathicity (GRAVY):-0.22