Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3504
Number of amino acids:63
Molecular Weight:6794.22 Da
Theoretical pI:9.3


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)23.17%
Cysteine CYS (C)914.29%
Glutamic Acid GLU (E)23.17%
Aspartic Acid ASP (D)00%
Glycine GLY (G)711.11%
Phynylalanine PHE (F)11.59%
Isoleucine ILE (I)11.59%
Histidine HIS (H)00%
Lysine LYS (K)57.94%
Methionine MET (M)11.59%
Leucine LEU (L)914.29%
Asparagine ASN (N)23.17%
Glutamine GLN (Q)34.76%
Proline PRO (P)23.17%
Serine SER (S)46.35%
Arginine ARG (R)57.94%
Threonine THR (T)34.76%
Tryptophan TRP (W)00%
Valine VAL (V)69.52%
Tyrosine TYR (Y)11.59%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC287
HydrogenH494
NitrogenN88
OxygenO81
SulphurS10

FormulaC287H494N88O81S10
Total Number of Atoms:960


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):2
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    1990
Absorption 0.1% (=1 g/l)    0.293,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.219,   assuming all CYS residues are reduced
Aromaticity:0.032

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.01

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.57, 23.81, 22.22]

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:92.6983
Grand average of hydropathicity (GRAVY):0.25