Physicochemical Properties of Peptide



PPepDB ID:PPepDB_993
Number of amino acids:232
Molecular Weight:24704.16 Da
Theoretical pI:8.97


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)229.48%
Cysteine CYS (C)166.9%
Glutamic Acid GLU (E)31.29%
Aspartic Acid ASP (D)73.02%
Glycine GLY (G)2410.34%
Phynylalanine PHE (F)93.88%
Isoleucine ILE (I)83.45%
Histidine HIS (H)00%
Lysine LYS (K)156.47%
Methionine MET (M)20.86%
Leucine LEU (L)166.9%
Asparagine ASN (N)177.33%
Glutamine GLN (Q)83.45%
Proline PRO (P)104.31%
Serine SER (S)166.9%
Arginine ARG (R)62.59%
Threonine THR (T)2410.34%
Tryptophan TRP (W)41.72%
Valine VAL (V)135.6%
Tyrosine TYR (Y)125.17%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1085
HydrogenH1684
NitrogenN294
OxygenO330
SulphurS18

FormulaC1085H1684N294O330S18
Total Number of Atoms:3411


Total number of positively charged residues (ARG + LYS):21
Total number of negatively charged residues (ASP + GLU):10
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    40880
Absorption 0.1% (=1 g/l)    1.655,   assuming all pairs of CYS residues form cystines

Ext. coefficient    39880
Absorption 0.1% (=1 g/l)    1.614,   assuming all CYS residues are reduced
Aromaticity:0.108

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 21.39

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.72, 28.88, 18.53]

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:66.0776
Grand average of hydropathicity (GRAVY):-0.10