Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4907
Number of amino acids:258
Molecular Weight:29109.51 Da
Theoretical pI:9.11


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)145.43%
Cysteine CYS (C)135.04%
Glutamic Acid GLU (E)41.55%
Aspartic Acid ASP (D)166.2%
Glycine GLY (G)238.91%
Phynylalanine PHE (F)145.43%
Isoleucine ILE (I)135.04%
Histidine HIS (H)41.55%
Lysine LYS (K)197.36%
Methionine MET (M)103.88%
Leucine LEU (L)186.98%
Asparagine ASN (N)166.2%
Glutamine GLN (Q)103.88%
Proline PRO (P)51.94%
Serine SER (S)186.98%
Arginine ARG (R)135.04%
Threonine THR (T)145.43%
Tryptophan TRP (W)41.55%
Valine VAL (V)166.2%
Tyrosine TYR (Y)145.43%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1288
HydrogenH1992
NitrogenN354
OxygenO371
SulphurS23

FormulaC1288H1992N354O371S23
Total Number of Atoms:4028


Total number of positively charged residues (ARG + LYS):32
Total number of negatively charged residues (ASP + GLU):20
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    43610
Absorption 0.1% (=1 g/l)    1.498,   assuming all pairs of CYS residues form cystines

Ext. coefficient    42860
Absorption 0.1% (=1 g/l)    1.472,   assuming all CYS residues are reduced
Aromaticity:0.124

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.32

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.62, 24.03, 17.83]

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:70.2713
Grand average of hydropathicity (GRAVY):-0.23