Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4258
Number of amino acids:697
Molecular Weight:78639.98 Da
Theoretical pI:6.28


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)324.59%
Cysteine CYS (C)60.86%
Glutamic Acid GLU (E)365.16%
Aspartic Acid ASP (D)405.74%
Glycine GLY (G)537.6%
Phynylalanine PHE (F)344.88%
Isoleucine ILE (I)375.31%
Histidine HIS (H)131.87%
Lysine LYS (K)436.17%
Methionine MET (M)172.44%
Leucine LEU (L)7210.33%
Asparagine ASN (N)365.16%
Glutamine GLN (Q)233.3%
Proline PRO (P)446.31%
Serine SER (S)517.32%
Arginine ARG (R)284.02%
Threonine THR (T)365.16%
Tryptophan TRP (W)152.15%
Valine VAL (V)507.17%
Tyrosine TYR (Y)314.45%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3579
HydrogenH5498
NitrogenN924
OxygenO1027
SulphurS23

FormulaC3579H5498N924O1027S23
Total Number of Atoms:11051


Total number of positively charged residues (ARG + LYS):71
Total number of negatively charged residues (ASP + GLU):76
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    129065
Absorption 0.1% (=1 g/l)    1.641,   assuming all pairs of CYS residues form cystines

Ext. coefficient    128690
Absorption 0.1% (=1 g/l)    1.636,   assuming all CYS residues are reduced
Aromaticity:0.115

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.66

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.29, 26.40, 22.53]

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:86.3845
Grand average of hydropathicity (GRAVY):-0.24