Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5346
Number of amino acids:218
Molecular Weight:23934.89 Da
Theoretical pI:7.96


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)146.42%
Cysteine CYS (C)31.38%
Glutamic Acid GLU (E)104.59%
Aspartic Acid ASP (D)135.96%
Glycine GLY (G)2310.55%
Phynylalanine PHE (F)62.75%
Isoleucine ILE (I)125.5%
Histidine HIS (H)115.05%
Lysine LYS (K)177.8%
Methionine MET (M)31.38%
Leucine LEU (L)177.8%
Asparagine ASN (N)52.29%
Glutamine GLN (Q)104.59%
Proline PRO (P)73.21%
Serine SER (S)2310.55%
Arginine ARG (R)73.21%
Threonine THR (T)125.5%
Tryptophan TRP (W)52.29%
Valine VAL (V)125.5%
Tyrosine TYR (Y)83.67%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1061
HydrogenH1644
NitrogenN298
OxygenO323
SulphurS6

FormulaC1061H1644N298O323S6
Total Number of Atoms:3332


Total number of positively charged residues (ARG + LYS):24
Total number of negatively charged residues (ASP + GLU):23
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    39545
Absorption 0.1% (=1 g/l)    1.652,   assuming all pairs of CYS residues form cystines

Ext. coefficient    39420
Absorption 0.1% (=1 g/l)    1.647,   assuming all CYS residues are reduced
Aromaticity:0.087

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.28

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.52, 26.61, 20.18]

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:74.2661
Grand average of hydropathicity (GRAVY):-0.48