Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6144
Number of amino acids:164
Molecular Weight:17678.86 Da
Theoretical pI:9.08


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2314.02%
Cysteine CYS (C)63.66%
Glutamic Acid GLU (E)31.83%
Aspartic Acid ASP (D)53.05%
Glycine GLY (G)148.54%
Phynylalanine PHE (F)31.83%
Isoleucine ILE (I)63.66%
Histidine HIS (H)31.83%
Lysine LYS (K)84.88%
Methionine MET (M)31.83%
Leucine LEU (L)74.27%
Asparagine ASN (N)169.76%
Glutamine GLN (Q)106.1%
Proline PRO (P)63.66%
Serine SER (S)127.32%
Arginine ARG (R)63.66%
Threonine THR (T)63.66%
Tryptophan TRP (W)53.05%
Valine VAL (V)148.54%
Tyrosine TYR (Y)84.88%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC773
HydrogenH1189
NitrogenN227
OxygenO233
SulphurS9

FormulaC773H1189N227O233S9
Total Number of Atoms:2431


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):8
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    39795
Absorption 0.1% (=1 g/l)    2.251,   assuming all pairs of CYS residues form cystines

Ext. coefficient    39420
Absorption 0.1% (=1 g/l)    2.230,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 24.55

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.22, 29.27, 21.95]

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:69.6951
Grand average of hydropathicity (GRAVY):-0.29