Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5927
Number of amino acids:349
Molecular Weight:38339.5 Da
Theoretical pI:6.51


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)257.16%
Cysteine CYS (C)82.29%
Glutamic Acid GLU (E)144.01%
Aspartic Acid ASP (D)298.31%
Glycine GLY (G)267.45%
Phynylalanine PHE (F)92.58%
Isoleucine ILE (I)133.72%
Histidine HIS (H)41.15%
Lysine LYS (K)205.73%
Methionine MET (M)41.15%
Leucine LEU (L)349.74%
Asparagine ASN (N)102.87%
Glutamine GLN (Q)113.15%
Proline PRO (P)164.58%
Serine SER (S)329.17%
Arginine ARG (R)226.3%
Threonine THR (T)195.44%
Tryptophan TRP (W)41.15%
Valine VAL (V)349.74%
Tyrosine TYR (Y)154.3%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1692
HydrogenH2688
NitrogenN468
OxygenO523
SulphurS12

FormulaC1692H2688N468O523S12
Total Number of Atoms:5383


Total number of positively charged residues (ARG + LYS):42
Total number of negatively charged residues (ASP + GLU):43
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    44850
Absorption 0.1% (=1 g/l)    1.170,   assuming all pairs of CYS residues form cystines

Ext. coefficient    44350
Absorption 0.1% (=1 g/l)    1.157,   assuming all CYS residues are reduced
Aromaticity:0.080

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.86

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.23, 24.07, 22.06]

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:87.937
Grand average of hydropathicity (GRAVY):-0.24