Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4049
Number of amino acids:728
Molecular Weight:81532.84 Da
Theoretical pI:8.06


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)466.32%
Cysteine CYS (C)141.92%
Glutamic Acid GLU (E)425.77%
Aspartic Acid ASP (D)293.98%
Glycine GLY (G)648.79%
Phynylalanine PHE (F)293.98%
Isoleucine ILE (I)405.49%
Histidine HIS (H)152.06%
Lysine LYS (K)517.01%
Methionine MET (M)162.2%
Leucine LEU (L)557.55%
Asparagine ASN (N)375.08%
Glutamine GLN (Q)223.02%
Proline PRO (P)415.63%
Serine SER (S)517.01%
Arginine ARG (R)233.16%
Threonine THR (T)517.01%
Tryptophan TRP (W)253.43%
Valine VAL (V)435.91%
Tyrosine TYR (Y)344.67%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3695
HydrogenH5616
NitrogenN962
OxygenO1066
SulphurS30

FormulaC3695H5616N962O1066S30
Total Number of Atoms:11369


Total number of positively charged residues (ARG + LYS):74
Total number of negatively charged residues (ASP + GLU):71
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    189035
Absorption 0.1% (=1 g/l)    2.319,   assuming all pairs of CYS residues form cystines

Ext. coefficient    188160
Absorption 0.1% (=1 g/l)    2.308,   assuming all CYS residues are reduced
Aromaticity:0.121

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.43

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.04, 26.51, 21.84]

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:74.3407
Grand average of hydropathicity (GRAVY):-0.33