Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4001
Number of amino acids:496
Molecular Weight:54461.02 Da
Theoretical pI:7.3


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)469.27%
Cysteine CYS (C)71.41%
Glutamic Acid GLU (E)173.43%
Aspartic Acid ASP (D)275.44%
Glycine GLY (G)397.86%
Phynylalanine PHE (F)234.64%
Isoleucine ILE (I)234.64%
Histidine HIS (H)122.42%
Lysine LYS (K)285.65%
Methionine MET (M)132.62%
Leucine LEU (L)367.26%
Asparagine ASN (N)275.44%
Glutamine GLN (Q)153.02%
Proline PRO (P)193.83%
Serine SER (S)6212.5%
Arginine ARG (R)163.23%
Threonine THR (T)265.24%
Tryptophan TRP (W)102.02%
Valine VAL (V)234.64%
Tyrosine TYR (Y)275.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2428
HydrogenH3680
NitrogenN648
OxygenO742
SulphurS20

FormulaC2428H3680N648O742S20
Total Number of Atoms:7518


Total number of positively charged residues (ARG + LYS):44
Total number of negatively charged residues (ASP + GLU):44
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    95605
Absorption 0.1% (=1 g/l)    1.755,   assuming all pairs of CYS residues form cystines

Ext. coefficient    95230
Absorption 0.1% (=1 g/l)    1.749,   assuming all CYS residues are reduced
Aromaticity:0.121

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.53

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.63, 29.64, 22.58]

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:69.1129
Grand average of hydropathicity (GRAVY):-0.31