Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4451
Number of amino acids:506
Molecular Weight:57114.3 Da
Theoretical pI:5.35


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)254.94%
Cysteine CYS (C)61.19%
Glutamic Acid GLU (E)346.72%
Aspartic Acid ASP (D)265.14%
Glycine GLY (G)387.51%
Phynylalanine PHE (F)285.53%
Isoleucine ILE (I)254.94%
Histidine HIS (H)112.17%
Lysine LYS (K)275.34%
Methionine MET (M)81.58%
Leucine LEU (L)5210.28%
Asparagine ASN (N)254.94%
Glutamine GLN (Q)234.55%
Proline PRO (P)234.55%
Serine SER (S)5410.67%
Arginine ARG (R)193.75%
Threonine THR (T)244.74%
Tryptophan TRP (W)163.16%
Valine VAL (V)265.14%
Tyrosine TYR (Y)163.16%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2577
HydrogenH3910
NitrogenN676
OxygenO769
SulphurS14

FormulaC2577H3910N676O769S14
Total Number of Atoms:7946


Total number of positively charged residues (ARG + LYS):46
Total number of negatively charged residues (ASP + GLU):60
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    112215
Absorption 0.1% (=1 g/l)    1.965,   assuming all pairs of CYS residues form cystines

Ext. coefficient    111840
Absorption 0.1% (=1 g/l)    1.958,   assuming all CYS residues are reduced
Aromaticity:0.119

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.59

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.21, 27.67, 23.52]

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:79.1898
Grand average of hydropathicity (GRAVY):-0.35