Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5099
Number of amino acids:437
Molecular Weight:49784.58 Da
Theoretical pI:6.41


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)143.2%
Cysteine CYS (C)102.29%
Glutamic Acid GLU (E)245.49%
Aspartic Acid ASP (D)204.58%
Glycine GLY (G)347.78%
Phynylalanine PHE (F)153.43%
Isoleucine ILE (I)347.78%
Histidine HIS (H)143.2%
Lysine LYS (K)255.72%
Methionine MET (M)92.06%
Leucine LEU (L)419.38%
Asparagine ASN (N)276.18%
Glutamine GLN (Q)143.2%
Proline PRO (P)235.26%
Serine SER (S)388.7%
Arginine ARG (R)153.43%
Threonine THR (T)235.26%
Tryptophan TRP (W)102.29%
Valine VAL (V)194.35%
Tyrosine TYR (Y)286.41%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2250
HydrogenH3420
NitrogenN586
OxygenO656
SulphurS19

FormulaC2250H3420N586O656S19
Total Number of Atoms:6931


Total number of positively charged residues (ARG + LYS):40
Total number of negatively charged residues (ASP + GLU):44
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    97345
Absorption 0.1% (=1 g/l)    1.955,   assuming all pairs of CYS residues form cystines

Ext. coefficient    96720
Absorption 0.1% (=1 g/l)    1.943,   assuming all CYS residues are reduced
Aromaticity:0.121

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.27

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.64, 27.92, 20.14]

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:82.746
Grand average of hydropathicity (GRAVY):-0.35