Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4791
Number of amino acids:625
Molecular Weight:69800.13 Da
Theoretical pI:5.47


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)396.24%
Cysteine CYS (C)345.44%
Glutamic Acid GLU (E)436.88%
Aspartic Acid ASP (D)386.08%
Glycine GLY (G)518.16%
Phynylalanine PHE (F)274.32%
Isoleucine ILE (I)345.44%
Histidine HIS (H)91.44%
Lysine LYS (K)365.76%
Methionine MET (M)111.76%
Leucine LEU (L)447.04%
Asparagine ASN (N)304.8%
Glutamine GLN (Q)213.36%
Proline PRO (P)284.48%
Serine SER (S)426.72%
Arginine ARG (R)335.28%
Threonine THR (T)355.6%
Tryptophan TRP (W)121.92%
Valine VAL (V)365.76%
Tyrosine TYR (Y)223.52%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3063
HydrogenH4743
NitrogenN841
OxygenO938
SulphurS45

FormulaC3063H4743N841O938S45
Total Number of Atoms:9630


Total number of positively charged residues (ARG + LYS):69
Total number of negatively charged residues (ASP + GLU):81
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    100905
Absorption 0.1% (=1 g/l)    1.446,   assuming all pairs of CYS residues form cystines

Ext. coefficient    98780
Absorption 0.1% (=1 g/l)    1.415,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.71

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.00, 24.16, 21.92]

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:71.616
Grand average of hydropathicity (GRAVY):-0.35