Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4728
Number of amino acids:289
Molecular Weight:32687.11 Da
Theoretical pI:9.29


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)196.57%
Cysteine CYS (C)41.38%
Glutamic Acid GLU (E)93.11%
Aspartic Acid ASP (D)165.54%
Glycine GLY (G)258.65%
Phynylalanine PHE (F)237.96%
Isoleucine ILE (I)103.46%
Histidine HIS (H)51.73%
Lysine LYS (K)196.57%
Methionine MET (M)51.73%
Leucine LEU (L)248.3%
Asparagine ASN (N)144.84%
Glutamine GLN (Q)103.46%
Proline PRO (P)134.5%
Serine SER (S)248.3%
Arginine ARG (R)155.19%
Threonine THR (T)175.88%
Tryptophan TRP (W)72.42%
Valine VAL (V)165.54%
Tyrosine TYR (Y)144.84%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1492
HydrogenH2238
NitrogenN394
OxygenO419
SulphurS9

FormulaC1492H2238N394O419S9
Total Number of Atoms:4552


Total number of positively charged residues (ARG + LYS):34
Total number of negatively charged residues (ASP + GLU):25
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    59610
Absorption 0.1% (=1 g/l)    1.824,   assuming all pairs of CYS residues form cystines

Ext. coefficient    59360
Absorption 0.1% (=1 g/l)    1.816,   assuming all CYS residues are reduced
Aromaticity:0.152

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.70

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.53, 26.30, 19.72]

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:68.5121
Grand average of hydropathicity (GRAVY):-0.33