Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5863
Number of amino acids:163
Molecular Weight:17840.43 Da
Theoretical pI:7


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)137.98%
Cysteine CYS (C)42.45%
Glutamic Acid GLU (E)74.29%
Aspartic Acid ASP (D)106.13%
Glycine GLY (G)116.75%
Phynylalanine PHE (F)74.29%
Isoleucine ILE (I)148.59%
Histidine HIS (H)31.84%
Lysine LYS (K)106.13%
Methionine MET (M)31.84%
Leucine LEU (L)137.98%
Asparagine ASN (N)74.29%
Glutamine GLN (Q)21.23%
Proline PRO (P)84.91%
Serine SER (S)137.98%
Arginine ARG (R)74.29%
Threonine THR (T)159.2%
Tryptophan TRP (W)10.61%
Valine VAL (V)95.52%
Tyrosine TYR (Y)63.68%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC795
HydrogenH1260
NitrogenN210
OxygenO241
SulphurS7

FormulaC795H1260N210O241S7
Total Number of Atoms:2513


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

Ext. coefficient    14690
Absorption 0.1% (=1 g/l)    0.823,   assuming all pairs of CYS residues form cystines

Ext. coefficient    14440
Absorption 0.1% (=1 g/l)    0.809,   assuming all CYS residues are reduced
Aromaticity:0.086

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.40

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.67, 23.93, 22.09]

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:88.589
Grand average of hydropathicity (GRAVY):-0.06