Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5559
Number of amino acids:620
Molecular Weight:68591.62 Da
Theoretical pI:9.57


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)528.39%
Cysteine CYS (C)50.81%
Glutamic Acid GLU (E)152.42%
Aspartic Acid ASP (D)284.52%
Glycine GLY (G)548.71%
Phynylalanine PHE (F)274.35%
Isoleucine ILE (I)193.06%
Histidine HIS (H)111.77%
Lysine LYS (K)274.35%
Methionine MET (M)142.26%
Leucine LEU (L)538.55%
Asparagine ASN (N)325.16%
Glutamine GLN (Q)223.55%
Proline PRO (P)325.16%
Serine SER (S)6310.16%
Arginine ARG (R)386.13%
Threonine THR (T)355.65%
Tryptophan TRP (W)132.1%
Valine VAL (V)447.1%
Tyrosine TYR (Y)365.81%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3081
HydrogenH4714
NitrogenN850
OxygenO895
SulphurS19

FormulaC3081H4714N850O895S19
Total Number of Atoms:9559


Total number of positively charged residues (ARG + LYS):65
Total number of negatively charged residues (ASP + GLU):43
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    125390
Absorption 0.1% (=1 g/l)    1.828,   assuming all pairs of CYS residues form cystines

Ext. coefficient    125140
Absorption 0.1% (=1 g/l)    1.824,   assuming all CYS residues are reduced
Aromaticity:0.123

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.81

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.97, 29.19, 21.61]

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:74.2581
Grand average of hydropathicity (GRAVY):-0.29