Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4985
Number of amino acids:525
Molecular Weight:57868.46 Da
Theoretical pI:6.83


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)428%
Cysteine CYS (C)50.95%
Glutamic Acid GLU (E)193.62%
Aspartic Acid ASP (D)387.24%
Glycine GLY (G)428%
Phynylalanine PHE (F)264.95%
Isoleucine ILE (I)203.81%
Histidine HIS (H)91.71%
Lysine LYS (K)428%
Methionine MET (M)101.9%
Leucine LEU (L)519.71%
Asparagine ASN (N)254.76%
Glutamine GLN (Q)142.67%
Proline PRO (P)264.95%
Serine SER (S)489.14%
Arginine ARG (R)142.67%
Threonine THR (T)346.48%
Tryptophan TRP (W)132.48%
Valine VAL (V)275.14%
Tyrosine TYR (Y)203.81%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2610
HydrogenH4001
NitrogenN679
OxygenO781
SulphurS15

FormulaC2610H4001N679O781S15
Total Number of Atoms:8086


Total number of positively charged residues (ARG + LYS):56
Total number of negatively charged residues (ASP + GLU):57
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    101550
Absorption 0.1% (=1 g/l)    1.755,   assuming all pairs of CYS residues form cystines

Ext. coefficient    101300
Absorption 0.1% (=1 g/l)    1.751,   assuming all CYS residues are reduced
Aromaticity:0.112

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.60

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.90, 26.86, 23.24]

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:75.6572
Grand average of hydropathicity (GRAVY):-0.33