Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5379
Number of amino acids:833
Molecular Weight:88899.1 Da
Theoretical pI:8.73


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)8710.44%
Cysteine CYS (C)131.56%
Glutamic Acid GLU (E)516.12%
Aspartic Acid ASP (D)445.28%
Glycine GLY (G)728.64%
Phynylalanine PHE (F)242.88%
Isoleucine ILE (I)172.04%
Histidine HIS (H)283.36%
Lysine LYS (K)414.92%
Methionine MET (M)161.92%
Leucine LEU (L)799.48%
Asparagine ASN (N)232.76%
Glutamine GLN (Q)161.92%
Proline PRO (P)779.24%
Serine SER (S)728.64%
Arginine ARG (R)627.44%
Threonine THR (T)323.84%
Tryptophan TRP (W)30.36%
Valine VAL (V)678.04%
Tyrosine TYR (Y)91.08%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3883
HydrogenH6246
NitrogenN1158
OxygenO1176
SulphurS29

FormulaC3883H6246N1158O1176S29
Total Number of Atoms:12492


Total number of positively charged residues (ARG + LYS):103
Total number of negatively charged residues (ASP + GLU):95
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    30660
Absorption 0.1% (=1 g/l)    0.345,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29910
Absorption 0.1% (=1 g/l)    0.336,   assuming all CYS residues are reduced
Aromaticity:0.043

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 56.74

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.89, 29.29, 27.97]

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:78.7155
Grand average of hydropathicity (GRAVY):-0.36