Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4282
Number of amino acids:516
Molecular Weight:57301.38 Da
Theoretical pI:5.2


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)377.17%
Cysteine CYS (C)91.74%
Glutamic Acid GLU (E)305.81%
Aspartic Acid ASP (D)316.01%
Glycine GLY (G)428.14%
Phynylalanine PHE (F)285.43%
Isoleucine ILE (I)234.46%
Histidine HIS (H)112.13%
Lysine LYS (K)295.62%
Methionine MET (M)142.71%
Leucine LEU (L)5711.05%
Asparagine ASN (N)265.04%
Glutamine GLN (Q)132.52%
Proline PRO (P)224.26%
Serine SER (S)387.36%
Arginine ARG (R)163.1%
Threonine THR (T)244.65%
Tryptophan TRP (W)81.55%
Valine VAL (V)366.98%
Tyrosine TYR (Y)224.26%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2589
HydrogenH3972
NitrogenN662
OxygenO762
SulphurS23

FormulaC2589H3972N662O762S23
Total Number of Atoms:8008


Total number of positively charged residues (ARG + LYS):45
Total number of negatively charged residues (ASP + GLU):61
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    77280
Absorption 0.1% (=1 g/l)    1.349,   assuming all pairs of CYS residues form cystines

Ext. coefficient    76780
Absorption 0.1% (=1 g/l)    1.340,   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 : 36.20

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.72, 24.81, 26.74]

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:87.8681
Grand average of hydropathicity (GRAVY):-0.08