Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5865
Number of amino acids:163
Molecular Weight:17871.45 Da
Theoretical pI:6.1


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)106.13%
Cysteine CYS (C)21.23%
Glutamic Acid GLU (E)116.75%
Aspartic Acid ASP (D)84.91%
Glycine GLY (G)137.98%
Phynylalanine PHE (F)31.84%
Isoleucine ILE (I)137.98%
Histidine HIS (H)42.45%
Lysine LYS (K)106.13%
Methionine MET (M)31.84%
Leucine LEU (L)1911.66%
Asparagine ASN (N)63.68%
Glutamine GLN (Q)31.84%
Proline PRO (P)95.52%
Serine SER (S)137.98%
Arginine ARG (R)74.29%
Threonine THR (T)159.2%
Tryptophan TRP (W)21.23%
Valine VAL (V)74.29%
Tyrosine TYR (Y)53.07%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC794
HydrogenH1277
NitrogenN213
OxygenO244
SulphurS5

FormulaC794H1277N213O244S5
Total Number of Atoms:2533


Total number of positively charged residues (ARG + LYS):17
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    18575
Absorption 0.1% (=1 g/l)    1.039,   assuming all pairs of CYS residues form cystines

Ext. coefficient    18450
Absorption 0.1% (=1 g/l)    1.032,   assuming all CYS residues are reduced
Aromaticity:0.061

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 61.82

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.06, 25.15, 26.38]

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:95.1532
Grand average of hydropathicity (GRAVY):-0.20