Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4052
Number of amino acids:696
Molecular Weight:75617.4 Da
Theoretical pI:4.85


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)324.6%
Cysteine CYS (C)284.02%
Glutamic Acid GLU (E)273.88%
Aspartic Acid ASP (D)497.04%
Glycine GLY (G)568.05%
Phynylalanine PHE (F)344.89%
Isoleucine ILE (I)304.31%
Histidine HIS (H)81.15%
Lysine LYS (K)355.03%
Methionine MET (M)152.16%
Leucine LEU (L)618.76%
Asparagine ASN (N)466.61%
Glutamine GLN (Q)213.02%
Proline PRO (P)436.18%
Serine SER (S)9213.22%
Arginine ARG (R)192.73%
Threonine THR (T)446.32%
Tryptophan TRP (W)81.15%
Valine VAL (V)253.59%
Tyrosine TYR (Y)233.3%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3298
HydrogenH5075
NitrogenN879
OxygenO1075
SulphurS43

FormulaC3298H5075N879O1075S43
Total Number of Atoms:10370


Total number of positively charged residues (ARG + LYS):54
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    80020
Absorption 0.1% (=1 g/l)    1.058,   assuming all pairs of CYS residues form cystines

Ext. coefficient    78270
Absorption 0.1% (=1 g/l)    1.035,   assuming all CYS residues are reduced
Aromaticity:0.093

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.91

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.01, 34.05, 19.40]

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:66.0057
Grand average of hydropathicity (GRAVY):-0.37