Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4038
Number of amino acids:184
Molecular Weight:19665.24 Da
Theoretical pI:7.11


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3317.93%
Cysteine CYS (C)31.63%
Glutamic Acid GLU (E)105.43%
Aspartic Acid ASP (D)115.98%
Glycine GLY (G)115.98%
Phynylalanine PHE (F)73.8%
Isoleucine ILE (I)21.09%
Histidine HIS (H)42.17%
Lysine LYS (K)94.89%
Methionine MET (M)31.63%
Leucine LEU (L)168.7%
Asparagine ASN (N)73.8%
Glutamine GLN (Q)73.8%
Proline PRO (P)42.17%
Serine SER (S)137.07%
Arginine ARG (R)126.52%
Threonine THR (T)84.35%
Tryptophan TRP (W)21.09%
Valine VAL (V)1910.33%
Tyrosine TYR (Y)31.63%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC858
HydrogenH1373
NitrogenN253
OxygenO265
SulphurS6

FormulaC858H1373N253O265S6
Total Number of Atoms:2755


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

Ext. coefficient    15595
Absorption 0.1% (=1 g/l)    0.793,   assuming all pairs of CYS residues form cystines

Ext. coefficient    15470
Absorption 0.1% (=1 g/l)    0.787,   assuming all CYS residues are reduced
Aromaticity:0.065

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.77

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.63, 19.02, 33.70]

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:86.0327
Grand average of hydropathicity (GRAVY):-0.08