Physicochemical Properties of Peptide



PPepDB ID:PPepDB_693
Number of amino acids:47
Molecular Weight:4833.47 Da
Theoretical pI:6.7


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)612.77%
Cysteine CYS (C)714.89%
Glutamic Acid GLU (E)12.13%
Aspartic Acid ASP (D)36.38%
Glycine GLY (G)48.51%
Phynylalanine PHE (F)12.13%
Isoleucine ILE (I)36.38%
Histidine HIS (H)12.13%
Lysine LYS (K)48.51%
Methionine MET (M)00%
Leucine LEU (L)12.13%
Asparagine ASN (N)48.51%
Glutamine GLN (Q)12.13%
Proline PRO (P)48.51%
Serine SER (S)24.26%
Arginine ARG (R)00%
Threonine THR (T)48.51%
Tryptophan TRP (W)00%
Valine VAL (V)00%
Tyrosine TYR (Y)12.13%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC199
HydrogenH316
NitrogenN58
OxygenO68
SulphurS7

FormulaC199H316N58O68S7
Total Number of Atoms:648


Total number of positively charged residues (ARG + LYS):4
Total number of negatively charged residues (ASP + GLU):4
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    1865
Absorption 0.1% (=1 g/l)    0.386,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.308,   assuming all CYS residues are reduced
Aromaticity:0.043

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.55

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[12.77, 29.79, 17.02]

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:45.9575
Grand average of hydropathicity (GRAVY):-0.33