Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5288
Number of amino acids:371
Molecular Weight:40710.76 Da
Theoretical pI:5.58


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)308.09%
Cysteine CYS (C)92.43%
Glutamic Acid GLU (E)246.47%
Aspartic Acid ASP (D)225.93%
Glycine GLY (G)369.7%
Phynylalanine PHE (F)123.23%
Isoleucine ILE (I)133.5%
Histidine HIS (H)82.16%
Lysine LYS (K)184.85%
Methionine MET (M)133.5%
Leucine LEU (L)277.28%
Asparagine ASN (N)308.09%
Glutamine GLN (Q)51.35%
Proline PRO (P)102.7%
Serine SER (S)256.74%
Arginine ARG (R)205.39%
Threonine THR (T)195.12%
Tryptophan TRP (W)51.35%
Valine VAL (V)318.36%
Tyrosine TYR (Y)143.77%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1768
HydrogenH2763
NitrogenN505
OxygenO557
SulphurS22

FormulaC1768H2763N505O557S22
Total Number of Atoms:5615


Total number of positively charged residues (ARG + LYS):38
Total number of negatively charged residues (ASP + GLU):46
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    48860
Absorption 0.1% (=1 g/l)    1.200,   assuming all pairs of CYS residues form cystines

Ext. coefficient    48360
Absorption 0.1% (=1 g/l)    1.188,   assuming all CYS residues are reduced
Aromaticity:0.084

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.65

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.49, 27.22, 25.34]

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:74.3666
Grand average of hydropathicity (GRAVY):-0.35