Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1996
Number of amino acids:29
Molecular Weight:2929.34 Da
Theoretical pI:7.78


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)13.45%
Cysteine CYS (C)620.69%
Glutamic Acid GLU (E)13.45%
Aspartic Acid ASP (D)00%
Glycine GLY (G)517.24%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)13.45%
Asparagine ASN (N)26.9%
Glutamine GLN (Q)00%
Proline PRO (P)310.34%
Serine SER (S)26.9%
Arginine ARG (R)26.9%
Threonine THR (T)310.34%
Tryptophan TRP (W)13.45%
Valine VAL (V)26.9%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC116
HydrogenH186
NitrogenN38
OxygenO39
SulphurS6

FormulaC116H186N38O39S6
Total Number of Atoms:385


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):1
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5875
Absorption 0.1% (=1 g/l)    2.006,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    1.878,   assuming all CYS residues are reduced
Aromaticity:0.034

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 55.05

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[13.79, 41.38, 10.34]

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:36.8966
Grand average of hydropathicity (GRAVY):-0.07