Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5521
Number of amino acids:325
Molecular Weight:35828.78 Da
Theoretical pI:9.31


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)237.08%
Cysteine CYS (C)92.77%
Glutamic Acid GLU (E)82.46%
Aspartic Acid ASP (D)185.54%
Glycine GLY (G)226.77%
Phynylalanine PHE (F)216.46%
Isoleucine ILE (I)185.54%
Histidine HIS (H)51.54%
Lysine LYS (K)123.69%
Methionine MET (M)82.46%
Leucine LEU (L)247.38%
Asparagine ASN (N)206.15%
Glutamine GLN (Q)195.85%
Proline PRO (P)144.31%
Serine SER (S)298.92%
Arginine ARG (R)247.38%
Threonine THR (T)237.08%
Tryptophan TRP (W)00%
Valine VAL (V)237.08%
Tyrosine TYR (Y)51.54%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1563
HydrogenH2492
NitrogenN458
OxygenO474
SulphurS17

FormulaC1563H2492N458O474S17
Total Number of Atoms:5004


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):26
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7950
Absorption 0.1% (=1 g/l)    0.222,   assuming all pairs of CYS residues form cystines

Ext. coefficient    7450
Absorption 0.1% (=1 g/l)    0.208,   assuming all CYS residues are reduced
Aromaticity:0.080

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 47.47

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.00, 26.15, 19.38]

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:78
Grand average of hydropathicity (GRAVY):-0.21