Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4471
Number of amino acids:473
Molecular Weight:52874.15 Da
Theoretical pI:6.64


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)316.55%
Cysteine CYS (C)61.27%
Glutamic Acid GLU (E)194.02%
Aspartic Acid ASP (D)265.5%
Glycine GLY (G)367.61%
Phynylalanine PHE (F)255.29%
Isoleucine ILE (I)194.02%
Histidine HIS (H)112.33%
Lysine LYS (K)245.07%
Methionine MET (M)122.54%
Leucine LEU (L)459.51%
Asparagine ASN (N)224.65%
Glutamine GLN (Q)132.75%
Proline PRO (P)245.07%
Serine SER (S)459.51%
Arginine ARG (R)194.02%
Threonine THR (T)255.29%
Tryptophan TRP (W)112.33%
Valine VAL (V)367.61%
Tyrosine TYR (Y)245.07%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2400
HydrogenH3642
NitrogenN622
OxygenO693
SulphurS18

FormulaC2400H3642N622O693S18
Total Number of Atoms:7375


Total number of positively charged residues (ARG + LYS):43
Total number of negatively charged residues (ASP + GLU):45
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    96635
Absorption 0.1% (=1 g/l)    1.828,   assuming all pairs of CYS residues form cystines

Ext. coefficient    96260
Absorption 0.1% (=1 g/l)    1.821,   assuming all CYS residues are reduced
Aromaticity:0.127

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 50.07

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.83, 26.85, 22.62]

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:81.3953
Grand average of hydropathicity (GRAVY):-0.15