Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4045
Number of amino acids:531
Molecular Weight:58597.59 Da
Theoretical pI:6.11


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)7614.31%
Cysteine CYS (C)71.32%
Glutamic Acid GLU (E)326.03%
Aspartic Acid ASP (D)346.4%
Glycine GLY (G)519.6%
Phynylalanine PHE (F)152.82%
Isoleucine ILE (I)112.07%
Histidine HIS (H)193.58%
Lysine LYS (K)193.58%
Methionine MET (M)122.26%
Leucine LEU (L)458.47%
Asparagine ASN (N)183.39%
Glutamine GLN (Q)173.2%
Proline PRO (P)142.64%
Serine SER (S)254.71%
Arginine ARG (R)387.16%
Threonine THR (T)224.14%
Tryptophan TRP (W)112.07%
Valine VAL (V)356.59%
Tyrosine TYR (Y)305.65%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2590
HydrogenH3956
NitrogenN748
OxygenO776
SulphurS19

FormulaC2590H3956N748O776S19
Total Number of Atoms:8089


Total number of positively charged residues (ARG + LYS):57
Total number of negatively charged residues (ASP + GLU):66
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    105575
Absorption 0.1% (=1 g/l)    1.802,   assuming all pairs of CYS residues form cystines

Ext. coefficient    105200
Absorption 0.1% (=1 g/l)    1.795,   assuming all CYS residues are reduced
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.52

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.68, 20.34, 31.07]

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:74.5574
Grand average of hydropathicity (GRAVY):-0.38