Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4459
Number of amino acids:441
Molecular Weight:49697.27 Da
Theoretical pI:8.91


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)255.67%
Cysteine CYS (C)184.08%
Glutamic Acid GLU (E)102.27%
Aspartic Acid ASP (D)143.17%
Glycine GLY (G)255.67%
Phynylalanine PHE (F)265.9%
Isoleucine ILE (I)276.12%
Histidine HIS (H)61.36%
Lysine LYS (K)235.22%
Methionine MET (M)92.04%
Leucine LEU (L)357.94%
Asparagine ASN (N)317.03%
Glutamine GLN (Q)214.76%
Proline PRO (P)327.26%
Serine SER (S)337.48%
Arginine ARG (R)132.95%
Threonine THR (T)357.94%
Tryptophan TRP (W)153.4%
Valine VAL (V)265.9%
Tyrosine TYR (Y)173.85%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2264
HydrogenH3428
NitrogenN582
OxygenO627
SulphurS27

FormulaC2264H3428N582O627S27
Total Number of Atoms:6928


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):24
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    108955
Absorption 0.1% (=1 g/l)    2.192,   assuming all pairs of CYS residues form cystines

Ext. coefficient    107830
Absorption 0.1% (=1 g/l)    2.170,   assuming all CYS residues are reduced
Aromaticity:0.132

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.67

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.11, 27.44, 17.91]

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:77.5964
Grand average of hydropathicity (GRAVY):-0.09