Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1587
Number of amino acids:29
Molecular Weight:2908.27 Da
Theoretical pI:4.03


Amino Acid Composition:


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


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC115
HydrogenH183
NitrogenN33
OxygenO43
SulphurS6

FormulaC115H183N33O43S6
Total Number of Atoms:380


Total number of positively charged residues (ARG + LYS):1
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    375
Absorption 0.1% (=1 g/l)    0.129,   assuming all pairs of CYS residues form cystines

Ext. coefficient    0
Absorption 0.1% (=1 g/l)    0.000,   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 : 52.46

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[13.79, 34.48, 6.90]

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):0.02