Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5254
Number of amino acids:651
Molecular Weight:72706.06 Da
Theoretical pI:8.39


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)345.22%
Cysteine CYS (C)192.92%
Glutamic Acid GLU (E)365.53%
Aspartic Acid ASP (D)314.76%
Glycine GLY (G)426.45%
Phynylalanine PHE (F)365.53%
Isoleucine ILE (I)294.45%
Histidine HIS (H)152.3%
Lysine LYS (K)355.38%
Methionine MET (M)101.54%
Leucine LEU (L)7010.75%
Asparagine ASN (N)274.15%
Glutamine GLN (Q)182.76%
Proline PRO (P)223.38%
Serine SER (S)649.83%
Arginine ARG (R)385.84%
Threonine THR (T)507.68%
Tryptophan TRP (W)40.61%
Valine VAL (V)487.37%
Tyrosine TYR (Y)233.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3234
HydrogenH5093
NitrogenN879
OxygenO968
SulphurS29

FormulaC3234H5093N879O968S29
Total Number of Atoms:10203


Total number of positively charged residues (ARG + LYS):73
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    57395
Absorption 0.1% (=1 g/l)    0.789,   assuming all pairs of CYS residues form cystines

Ext. coefficient    56270
Absorption 0.1% (=1 g/l)    0.774,   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 : 42.52

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.26, 23.81, 23.04]

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:85.914
Grand average of hydropathicity (GRAVY):-0.14