Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2719
Number of amino acids:49
Molecular Weight:5693.43 Da
Theoretical pI:9.16


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)24.08%
Cysteine CYS (C)48.16%
Glutamic Acid GLU (E)12.04%
Aspartic Acid ASP (D)36.12%
Glycine GLY (G)36.12%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)36.12%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)12.04%
Leucine LEU (L)12.04%
Asparagine ASN (N)36.12%
Glutamine GLN (Q)12.04%
Proline PRO (P)36.12%
Serine SER (S)36.12%
Arginine ARG (R)816.33%
Threonine THR (T)510.2%
Tryptophan TRP (W)00%
Valine VAL (V)36.12%
Tyrosine TYR (Y)510.2%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC239
HydrogenH381
NitrogenN77
OxygenO75
SulphurS5

FormulaC239H381N77O75S5
Total Number of Atoms:777


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):4
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7700
Absorption 0.1% (=1 g/l)    1.352,   assuming all pairs of CYS residues form cystines

Ext. coefficient    7450
Absorption 0.1% (=1 g/l)    1.309,   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 : 46.08

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.49, 24.49, 10.20]

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:53.6735
Grand average of hydropathicity (GRAVY):-0.76