Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4194
Number of amino acids:884
Molecular Weight:97966.21 Da
Theoretical pI:8.64


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)586.56%
Cysteine CYS (C)171.92%
Glutamic Acid GLU (E)596.67%
Aspartic Acid ASP (D)384.3%
Glycine GLY (G)394.41%
Phynylalanine PHE (F)313.51%
Isoleucine ILE (I)404.52%
Histidine HIS (H)303.39%
Lysine LYS (K)596.67%
Methionine MET (M)293.28%
Leucine LEU (L)9310.52%
Asparagine ASN (N)455.09%
Glutamine GLN (Q)333.73%
Proline PRO (P)606.79%
Serine SER (S)9610.86%
Arginine ARG (R)475.32%
Threonine THR (T)455.09%
Tryptophan TRP (W)20.23%
Valine VAL (V)525.88%
Tyrosine TYR (Y)111.24%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC4282
HydrogenH6918
NitrogenN1224
OxygenO1309
SulphurS46

FormulaC4282H6918N1224O1309S46
Total Number of Atoms:13779


Total number of positively charged residues (ARG + LYS):106
Total number of negatively charged residues (ASP + GLU):97
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    28390
Absorption 0.1% (=1 g/l)    0.290,   assuming all pairs of CYS residues form cystines

Ext. coefficient    27390
Absorption 0.1% (=1 g/l)    0.280,   assuming all CYS residues are reduced
Aromaticity:0.050

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 55.03

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.91, 27.15, 27.04]

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:82.2965
Grand average of hydropathicity (GRAVY):-0.39