Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4559
Number of amino acids:625
Molecular Weight:67463.39 Da
Theoretical pI:8.76


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)457.2%
Cysteine CYS (C)101.6%
Glutamic Acid GLU (E)294.64%
Aspartic Acid ASP (D)264.16%
Glycine GLY (G)508%
Phynylalanine PHE (F)284.48%
Isoleucine ILE (I)335.28%
Histidine HIS (H)81.28%
Lysine LYS (K)314.96%
Methionine MET (M)60.96%
Leucine LEU (L)7712.32%
Asparagine ASN (N)355.6%
Glutamine GLN (Q)182.88%
Proline PRO (P)416.56%
Serine SER (S)619.76%
Arginine ARG (R)314.96%
Threonine THR (T)345.44%
Tryptophan TRP (W)40.64%
Valine VAL (V)457.2%
Tyrosine TYR (Y)132.08%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3016
HydrogenH4822
NitrogenN822
OxygenO897
SulphurS16

FormulaC3016H4822N822O897S16
Total Number of Atoms:9573


Total number of positively charged residues (ARG + LYS):62
Total number of negatively charged residues (ASP + GLU):55
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    41995
Absorption 0.1% (=1 g/l)    0.622,   assuming all pairs of CYS residues form cystines

Ext. coefficient    41370
Absorption 0.1% (=1 g/l)    0.613,   assuming all CYS residues are reduced
Aromaticity:0.072

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.35

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.00, 29.92, 25.12]

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:96.72
Grand average of hydropathicity (GRAVY):-0.03