Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1248
Number of amino acids:244
Molecular Weight:25336.41 Da
Theoretical pI:5.31


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)197.79%
Cysteine CYS (C)166.56%
Glutamic Acid GLU (E)62.46%
Aspartic Acid ASP (D)124.92%
Glycine GLY (G)3012.3%
Phynylalanine PHE (F)145.74%
Isoleucine ILE (I)72.87%
Histidine HIS (H)20.82%
Lysine LYS (K)124.92%
Methionine MET (M)10.41%
Leucine LEU (L)197.79%
Asparagine ASN (N)104.1%
Glutamine GLN (Q)83.28%
Proline PRO (P)166.56%
Serine SER (S)2811.48%
Arginine ARG (R)31.23%
Threonine THR (T)208.2%
Tryptophan TRP (W)31.23%
Valine VAL (V)104.1%
Tyrosine TYR (Y)83.28%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1111
HydrogenH1692
NitrogenN290
OxygenO355
SulphurS17

FormulaC1111H1692N290O355S17
Total Number of Atoms:3465


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    29420
Absorption 0.1% (=1 g/l)    1.161,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28420
Absorption 0.1% (=1 g/l)    1.122,   assuming all CYS residues are reduced
Aromaticity:0.102

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.53

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.00, 34.43, 18.44]

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:61.2295
Grand average of hydropathicity (GRAVY):-0.08