Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1253
Number of amino acids:135
Molecular Weight:14809.24 Da
Theoretical pI:7.46


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)85.93%
Cysteine CYS (C)1410.37%
Glutamic Acid GLU (E)96.67%
Aspartic Acid ASP (D)53.7%
Glycine GLY (G)96.67%
Phynylalanine PHE (F)42.96%
Isoleucine ILE (I)85.93%
Histidine HIS (H)53.7%
Lysine LYS (K)107.41%
Methionine MET (M)32.22%
Leucine LEU (L)118.15%
Asparagine ASN (N)85.93%
Glutamine GLN (Q)21.48%
Proline PRO (P)32.22%
Serine SER (S)85.93%
Arginine ARG (R)53.7%
Threonine THR (T)96.67%
Tryptophan TRP (W)00%
Valine VAL (V)118.15%
Tyrosine TYR (Y)32.22%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC633
HydrogenH1028
NitrogenN180
OxygenO194
SulphurS17

FormulaC633H1028N180O194S17
Total Number of Atoms:2052


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):14
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    5345
Absorption 0.1% (=1 g/l)    0.361,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.302,   assuming all CYS residues are reduced
Aromaticity:0.052

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.35

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.41, 20.74, 22.96]

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:84.4445
Grand average of hydropathicity (GRAVY):0.03