Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4942
Number of amino acids:636
Molecular Weight:71693.23 Da
Theoretical pI:6.99


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)325.03%
Cysteine CYS (C)172.67%
Glutamic Acid GLU (E)365.66%
Aspartic Acid ASP (D)314.87%
Glycine GLY (G)375.82%
Phynylalanine PHE (F)284.4%
Isoleucine ILE (I)375.82%
Histidine HIS (H)152.36%
Lysine LYS (K)365.66%
Methionine MET (M)162.52%
Leucine LEU (L)619.59%
Asparagine ASN (N)335.19%
Glutamine GLN (Q)233.62%
Proline PRO (P)294.56%
Serine SER (S)568.81%
Arginine ARG (R)304.72%
Threonine THR (T)345.35%
Tryptophan TRP (W)91.42%
Valine VAL (V)518.02%
Tyrosine TYR (Y)253.93%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3206
HydrogenH5013
NitrogenN857
OxygenO942
SulphurS33

FormulaC3206H5013N857O942S33
Total Number of Atoms:10051


Total number of positively charged residues (ARG + LYS):66
Total number of negatively charged residues (ASP + GLU):67
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    87750
Absorption 0.1% (=1 g/l)    1.224,   assuming all pairs of CYS residues form cystines

Ext. coefficient    86750
Absorption 0.1% (=1 g/l)    1.210,   assuming all CYS residues are reduced
Aromaticity:0.097

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.63

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.18, 24.37, 22.80]

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:88.3805
Grand average of hydropathicity (GRAVY):-0.16