Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2430
Number of amino acids:49
Molecular Weight:5164.62 Da
Theoretical pI:8.49


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)510.2%
Cysteine CYS (C)48.16%
Glutamic Acid GLU (E)12.04%
Aspartic Acid ASP (D)24.08%
Glycine GLY (G)816.33%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)24.08%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)12.04%
Asparagine ASN (N)24.08%
Glutamine GLN (Q)36.12%
Proline PRO (P)36.12%
Serine SER (S)612.24%
Arginine ARG (R)510.2%
Threonine THR (T)12.04%
Tryptophan TRP (W)00%
Valine VAL (V)12.04%
Tyrosine TYR (Y)510.2%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC214
HydrogenH329
NitrogenN69
OxygenO73
SulphurS4

FormulaC214H329N69O73S4
Total Number of Atoms:689


Total number of positively charged residues (ARG + LYS):5
Total number of negatively charged residues (ASP + GLU):3
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)    1.491,   assuming all pairs of CYS residues form cystines

Ext. coefficient    7450
Absorption 0.1% (=1 g/l)    1.443,   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 : 35.48

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[18.37, 38.78, 14.29]

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:40
Grand average of hydropathicity (GRAVY):-0.70