Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5319
Number of amino acids:290
Molecular Weight:33141.4 Da
Theoretical pI:5.09


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)155.17%
Cysteine CYS (C)72.41%
Glutamic Acid GLU (E)196.55%
Aspartic Acid ASP (D)196.55%
Glycine GLY (G)196.55%
Phynylalanine PHE (F)175.86%
Isoleucine ILE (I)134.48%
Histidine HIS (H)103.45%
Lysine LYS (K)155.17%
Methionine MET (M)103.45%
Leucine LEU (L)196.55%
Asparagine ASN (N)144.83%
Glutamine GLN (Q)113.79%
Proline PRO (P)103.45%
Serine SER (S)217.24%
Arginine ARG (R)93.1%
Threonine THR (T)186.21%
Tryptophan TRP (W)93.1%
Valine VAL (V)248.28%
Tyrosine TYR (Y)113.79%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1488
HydrogenH2228
NitrogenN386
OxygenO442
SulphurS17

FormulaC1488H2228N386O442S17
Total Number of Atoms:4561


Total number of positively charged residues (ARG + LYS):24
Total number of negatively charged residues (ASP + GLU):38
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    66265
Absorption 0.1% (=1 g/l)    1.999,   assuming all pairs of CYS residues form cystines

Ext. coefficient    65890
Absorption 0.1% (=1 g/l)    1.988,   assuming all CYS residues are reduced
Aromaticity:0.128

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.50

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.07, 22.07, 21.72]

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:72.2069
Grand average of hydropathicity (GRAVY):-0.29