Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4078
Number of amino acids:96
Molecular Weight:9535.23 Da
Theoretical pI:9.33


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1818.75%
Cysteine CYS (C)99.38%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)11.04%
Glycine GLY (G)1313.54%
Phynylalanine PHE (F)22.08%
Isoleucine ILE (I)22.08%
Histidine HIS (H)11.04%
Lysine LYS (K)33.13%
Methionine MET (M)33.13%
Leucine LEU (L)66.25%
Asparagine ASN (N)33.13%
Glutamine GLN (Q)44.17%
Proline PRO (P)44.17%
Serine SER (S)55.21%
Arginine ARG (R)66.25%
Threonine THR (T)44.17%
Tryptophan TRP (W)00%
Valine VAL (V)1010.42%
Tyrosine TYR (Y)22.08%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC403
HydrogenH668
NitrogenN126
OxygenO117
SulphurS12

FormulaC403H668N126O117S12
Total Number of Atoms:1326


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):1
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    3480
Absorption 0.1% (=1 g/l)    0.365,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.313,   assuming all CYS residues are reduced
Aromaticity:0.042

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.62

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.92, 26.04, 28.12]

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:81.4584
Grand average of hydropathicity (GRAVY):0.51