Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4414
Number of amino acids:276
Molecular Weight:30133.24 Da
Theoretical pI:7.7


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)196.88%
Cysteine CYS (C)113.99%
Glutamic Acid GLU (E)145.07%
Aspartic Acid ASP (D)134.71%
Glycine GLY (G)3010.87%
Phynylalanine PHE (F)103.62%
Isoleucine ILE (I)103.62%
Histidine HIS (H)103.62%
Lysine LYS (K)155.43%
Methionine MET (M)72.54%
Leucine LEU (L)227.97%
Asparagine ASN (N)113.99%
Glutamine GLN (Q)93.26%
Proline PRO (P)165.8%
Serine SER (S)259.06%
Arginine ARG (R)134.71%
Threonine THR (T)93.26%
Tryptophan TRP (W)72.54%
Valine VAL (V)186.52%
Tyrosine TYR (Y)72.54%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1327
HydrogenH2049
NitrogenN377
OxygenO392
SulphurS18

FormulaC1327H2049N377O392S18
Total Number of Atoms:4163


Total number of positively charged residues (ARG + LYS):28
Total number of negatively charged residues (ASP + GLU):27
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    49555
Absorption 0.1% (=1 g/l)    1.645,   assuming all pairs of CYS residues form cystines

Ext. coefficient    48930
Absorption 0.1% (=1 g/l)    1.624,   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 : 49.92

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.81, 29.71, 22.46]

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:71.0145
Grand average of hydropathicity (GRAVY):-0.31