Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4504
Number of amino acids:440
Molecular Weight:48263.46 Da
Theoretical pI:6.26


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)378.41%
Cysteine CYS (C)30.68%
Glutamic Acid GLU (E)337.5%
Aspartic Acid ASP (D)143.18%
Glycine GLY (G)368.18%
Phynylalanine PHE (F)265.91%
Isoleucine ILE (I)184.09%
Histidine HIS (H)163.64%
Lysine LYS (K)286.36%
Methionine MET (M)173.86%
Leucine LEU (L)419.32%
Asparagine ASN (N)173.86%
Glutamine GLN (Q)173.86%
Proline PRO (P)214.77%
Serine SER (S)347.73%
Arginine ARG (R)132.95%
Threonine THR (T)194.32%
Tryptophan TRP (W)30.68%
Valine VAL (V)388.64%
Tyrosine TYR (Y)92.05%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2168
HydrogenH3392
NitrogenN576
OxygenO631
SulphurS20

FormulaC2168H3392N576O631S20
Total Number of Atoms:6787


Total number of positively charged residues (ARG + LYS):41
Total number of negatively charged residues (ASP + GLU):47
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    30035
Absorption 0.1% (=1 g/l)    0.622,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29910
Absorption 0.1% (=1 g/l)    0.620,   assuming all CYS residues are reduced
Aromaticity:0.086

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.24

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.68, 24.55, 29.09]

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:85.75
Grand average of hydropathicity (GRAVY):-0.07