Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5142
Number of amino acids:420
Molecular Weight:47939.61 Da
Theoretical pI:4.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)317.38%
Cysteine CYS (C)20.48%
Glutamic Acid GLU (E)4510.71%
Aspartic Acid ASP (D)5813.81%
Glycine GLY (G)266.19%
Phynylalanine PHE (F)122.86%
Isoleucine ILE (I)276.43%
Histidine HIS (H)92.14%
Lysine LYS (K)5312.62%
Methionine MET (M)30.71%
Leucine LEU (L)204.76%
Asparagine ASN (N)112.62%
Glutamine GLN (Q)102.38%
Proline PRO (P)245.71%
Serine SER (S)215%
Arginine ARG (R)61.43%
Threonine THR (T)194.52%
Tryptophan TRP (W)133.1%
Valine VAL (V)133.1%
Tyrosine TYR (Y)174.05%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2135
HydrogenH3225
NitrogenN543
OxygenO705
SulphurS5

FormulaC2135H3225N543O705S5
Total Number of Atoms:6613


Total number of positively charged residues (ARG + LYS):59
Total number of negatively charged residues (ASP + GLU):103
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    96955
Absorption 0.1% (=1 g/l)    2.022,   assuming all pairs of CYS residues form cystines

Ext. coefficient    96830
Absorption 0.1% (=1 g/l)    2.020,   assuming all CYS residues are reduced
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.02

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.29, 19.52, 23.57]

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:60
Grand average of hydropathicity (GRAVY):-1.09