Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2197
Number of amino acids:47
Molecular Weight:5288.19 Da
Theoretical pI:9.06


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)24.26%
Cysteine CYS (C)817.02%
Glutamic Acid GLU (E)12.13%
Aspartic Acid ASP (D)24.26%
Glycine GLY (G)24.26%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)48.51%
Histidine HIS (H)00%
Lysine LYS (K)510.64%
Methionine MET (M)00%
Leucine LEU (L)12.13%
Asparagine ASN (N)36.38%
Glutamine GLN (Q)00%
Proline PRO (P)36.38%
Serine SER (S)48.51%
Arginine ARG (R)48.51%
Threonine THR (T)48.51%
Tryptophan TRP (W)12.13%
Valine VAL (V)12.13%
Tyrosine TYR (Y)24.26%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC220
HydrogenH362
NitrogenN68
OxygenO67
SulphurS8

FormulaC220H362N68O67S8
Total Number of Atoms:725


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):3
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8980
Absorption 0.1% (=1 g/l)    1.698,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    1.604,   assuming all CYS residues are reduced
Aromaticity:0.064

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]:[19.15, 25.53, 8.51]

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:51.9149
Grand average of hydropathicity (GRAVY):-0.51