Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4381
Number of amino acids:512
Molecular Weight:57087.4 Da
Theoretical pI:4.98


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)418.01%
Cysteine CYS (C)40.78%
Glutamic Acid GLU (E)479.18%
Aspartic Acid ASP (D)336.45%
Glycine GLY (G)285.47%
Phynylalanine PHE (F)387.42%
Isoleucine ILE (I)254.88%
Histidine HIS (H)122.34%
Lysine LYS (K)499.57%
Methionine MET (M)20.39%
Leucine LEU (L)367.03%
Asparagine ASN (N)254.88%
Glutamine GLN (Q)203.91%
Proline PRO (P)305.86%
Serine SER (S)316.05%
Arginine ARG (R)61.17%
Threonine THR (T)234.49%
Tryptophan TRP (W)30.59%
Valine VAL (V)458.79%
Tyrosine TYR (Y)142.73%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2597
HydrogenH3977
NitrogenN651
OxygenO786
SulphurS6

FormulaC2597H3977N651O786S6
Total Number of Atoms:8017


Total number of positively charged residues (ARG + LYS):55
Total number of negatively charged residues (ASP + GLU):80
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    37610
Absorption 0.1% (=1 g/l)    0.659,   assuming all pairs of CYS residues form cystines

Ext. coefficient    37360
Absorption 0.1% (=1 g/l)    0.654,   assuming all CYS residues are reduced
Aromaticity:0.107

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.62

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.45, 22.27, 24.61]

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:79.9609
Grand average of hydropathicity (GRAVY):-0.36