Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5613
Number of amino acids:465
Molecular Weight:36681.81 Da
Theoretical pI:5.48


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)439.25%
Cysteine CYS (C)10.22%
Glutamic Acid GLU (E)132.8%
Aspartic Acid ASP (D)61.29%
Glycine GLY (G)29262.8%
Phynylalanine PHE (F)10.22%
Isoleucine ILE (I)30.65%
Histidine HIS (H)183.87%
Lysine LYS (K)00%
Methionine MET (M)10.22%
Leucine LEU (L)102.15%
Asparagine ASN (N)20.43%
Glutamine GLN (Q)143.01%
Proline PRO (P)20.43%
Serine SER (S)81.72%
Arginine ARG (R)40.86%
Threonine THR (T)61.29%
Tryptophan TRP (W)00%
Valine VAL (V)91.94%
Tyrosine TYR (Y)326.88%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1498
HydrogenH2143
NitrogenN529
OxygenO566
SulphurS2

FormulaC1498H2143N529O566S2
Total Number of Atoms:4738


Total number of positively charged residues (ARG + LYS):4
Total number of negatively charged residues (ASP + GLU):19
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    47680
Absorption 0.1% (=1 g/l)    1.300,   assuming all pairs of CYS residues form cystines

Ext. coefficient    47680
Absorption 0.1% (=1 g/l)    1.300,   assuming all CYS residues are reduced
Aromaticity:0.071

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.65

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[11.83, 65.38, 14.41]

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:25.7634
Grand average of hydropathicity (GRAVY):-0.42