Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5949
Number of amino acids:248
Molecular Weight:26629.09 Da
Theoretical pI:8.55


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2710.89%
Cysteine CYS (C)93.63%
Glutamic Acid GLU (E)20.81%
Aspartic Acid ASP (D)104.03%
Glycine GLY (G)2510.08%
Phynylalanine PHE (F)104.03%
Isoleucine ILE (I)114.44%
Histidine HIS (H)10.4%
Lysine LYS (K)104.03%
Methionine MET (M)72.82%
Leucine LEU (L)135.24%
Asparagine ASN (N)197.66%
Glutamine GLN (Q)114.44%
Proline PRO (P)114.44%
Serine SER (S)208.06%
Arginine ARG (R)62.42%
Threonine THR (T)208.06%
Tryptophan TRP (W)93.63%
Valine VAL (V)166.45%
Tyrosine TYR (Y)114.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1183
HydrogenH1789
NitrogenN317
OxygenO354
SulphurS16

FormulaC1183H1789N317O354S16
Total Number of Atoms:3659


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):12
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    66390
Absorption 0.1% (=1 g/l)    2.493,   assuming all pairs of CYS residues form cystines

Ext. coefficient    65890
Absorption 0.1% (=1 g/l)    2.474,   assuming all CYS residues are reduced
Aromaticity:0.121

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.95

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.23, 30.24, 19.76]

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:67.3387
Grand average of hydropathicity (GRAVY):-0.07