Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4893
Number of amino acids:262
Molecular Weight:28413.92 Da
Theoretical pI:4.9


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)218.02%
Cysteine CYS (C)20.76%
Glutamic Acid GLU (E)93.44%
Aspartic Acid ASP (D)166.11%
Glycine GLY (G)145.34%
Phynylalanine PHE (F)145.34%
Isoleucine ILE (I)103.82%
Histidine HIS (H)51.91%
Lysine LYS (K)114.2%
Methionine MET (M)10.38%
Leucine LEU (L)3513.36%
Asparagine ASN (N)218.02%
Glutamine GLN (Q)93.44%
Proline PRO (P)93.44%
Serine SER (S)3212.21%
Arginine ARG (R)51.91%
Threonine THR (T)176.49%
Tryptophan TRP (W)41.53%
Valine VAL (V)218.02%
Tyrosine TYR (Y)62.29%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1274
HydrogenH1982
NitrogenN332
OxygenO398
SulphurS3

FormulaC1274H1982N332O398S3
Total Number of Atoms:3989


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):25
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    31065
Absorption 0.1% (=1 g/l)    1.093,   assuming all pairs of CYS residues form cystines

Ext. coefficient    30940
Absorption 0.1% (=1 g/l)    1.089,   assuming all CYS residues are reduced
Aromaticity:0.092

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.10

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.35, 29.01, 25.19]

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:98.2444
Grand average of hydropathicity (GRAVY):0.03